{"title":"Blocks","description":null,"products":[{"product_id":"ronstan-series-30-utility-ball-bearing-block-single-swivel-shackle-head-rf30100","title":"Ronstan Series 30 Utility Ball Bearing Block, Single Swivel Shackle Head RF30100","description":"\u003cp\u003e\u003cstrong\u003eSeries 30 Utility Ball Bearing Block - Single, Swivel Shackle Head\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eLow friction 2-stage ball bearing system provides consistent performance over the full working load range.\u003c\/li\u003e\n\u003cli\u003eHigh static and dynamic load capacity.\u003c\/li\u003e\n\u003cli\u003eLight weight\u003c\/li\u003e\n\u003cli\u003eVersatile head fittings\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eProduct Information:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eSheaves running on Acetal or Torlon ball bearings provide high performance  low friction. The 2-stage ball bearing system provides consistent performance over the full load range.Can be fitted with a shackle in either of two planes to allow correct alignment of the block.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eApplications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ePrimary lead blocks on dinghies and catamarans\u003c\/li\u003e\n\u003cli\u003eControl lines on larger yachts\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eMaterials:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eU.V. stabilized Acetal sheaves\u003c\/li\u003e\n\u003cli\u003eAcetal ball bearings\u003c\/li\u003e\n\u003cli\u003eImpact modified, fiber reinforced and U.V. stabilized Nylon cheeks\u003c\/li\u003e\n\u003cli\u003eGrade 316 stainless steel load straps and head fittings\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\n\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cbr\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":44881641275481,"sku":"72397","price":46.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/72397XL.jpg?v=1789190365"},{"product_id":"ronstan-rf285-series-30-utility-block-cheek-curved-base","title":"Ronstan RF285 Series 30 Utility Block – Cheek, Curved Base","description":"\u003cp\u003e\u003cstrong\u003eSeries 30 Utility Block- Cheek, Curved Base\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eLightweight durable construction\u003c\/li\u003e\n\u003cli\u003eEconomical\u003c\/li\u003e\n\u003cli\u003eMaintenance free\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eProduct Information:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eStainless steel cheeks and Acetal sheaves ensure a long service life with virtually no maintenance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eApplications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eVang, cunningham and trapeze retriever systems on dinghies\u003c\/li\u003e\n\u003cli\u003eLeech line tackles, bunk adjusters etc on larger yachts\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eMaterials:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eU.V. stabilized Acetal sheaves\u003c\/li\u003e\n\u003cli\u003eGrade 316 stainless steel cheeks\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":44881642029145,"sku":"72300","price":42.97,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/72300XL.jpg?v=1789190635"},{"product_id":"ronstan-rf417-series-30-double-utility-block-with-tube-rivet","title":"Ronstan RF417 Series 30 Double Utility Block with Tube Rivet","description":"\u003cp\u003e\u003cstrong\u003eSeries 30 Utility Block- Double, Tube Rivet\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eLightweight durable construction\u003c\/li\u003e\n\u003cli\u003eEconomical\u003c\/li\u003e\n\u003cli\u003eMaintenance free\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eProduct Information:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eStainless steel cheeks and Acetal sheaves ensure a long service life with virtually no maintenance.Hollow rivets accept fixing screws, shackles or can be used as a becket for extra purchase.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eApplications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eVang, cunningham and trapeze retriever systems on dinghies\u003c\/li\u003e\n\u003cli\u003eLeech line tackles, bunk adjusters etc on larger yachts\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eMaterials:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eU.V. stabilized Acetal sheaves\u003c\/li\u003e\n\u003cli\u003eGrade 316 stainless steel cheeks\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":44881642422361,"sku":"72299","price":38.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/72299XL.jpg?v=1789190708"},{"product_id":"ronstan-rf681-series-30-utility-block-single-becket-with-loop-head","title":"Ronstan RF681 Series 30 Utility Block, Single Becket with Loop Head","description":"\u003cp\u003e\u003cstrong\u003eSeries 30 Utility Block - Single, Becket, Loop Head\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eLightweight durable construction\u003c\/li\u003e\n\u003cli\u003eEconomical\u003c\/li\u003e\n\u003cli\u003eMaintenance free\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eProduct Information:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eStainless steel cheeks and Acetal sheaves ensure a long service life with virtually no maintenance. Hollow rivets in the block heads can be fitted with shackles, which can also be used to add a becket for extra purchase.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eApplications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eVang, cunningham and trapeze retriever systems on dinghies\u003c\/li\u003e\n\u003cli\u003eLeech line tackles, bunk adjusters etc on larger yachts\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eMaterials:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eU.V. stabilized Acetal sheaves\u003c\/li\u003e\n\u003cli\u003eGrade 316 stainless steel cheeks\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\n\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cbr\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":44881642881113,"sku":"72293","price":34.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/72293XL.jpg?v=1789190766"},{"product_id":"barton-marine-size-0-20mm-plain-bearing-pulley-block-with-single-swivel-becket-n00191","title":"Barton Marine Size 0 20mm Plain Bearing Pulley Block with Single Swivel \u0026 Becket, N00191","description":"\u003cp id=\"isPasted\"\u003e\u003cstrong\u003eSize 0 20mm Plain Bearing Pulley Block Single Swivel  Becket\u003c\/strong\u003e\u003c\/p\u003e\u003cp id=\"isPasted\"\u003eThe Barton Size 0 Plain bearing block has 20mm (3\/4) sheaves and is also available in ball bearing sheaves. They are designed for high strength and performance but lightweight with the range starting at only 13gms (0.5oz).\u003c\/p\u003e\u003cp\u003eSuitable for up to 6mm (1\/4) rope Ideal for use on dinghies, day boats smaller craft or lead blocks, flag pennants, etc. on larger yachts.\u003c\/p\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\n\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\n\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cbr\u003e\n","brand":"Barton Marine","offers":[{"title":"Default Title","offer_id":44881651794009,"sku":"106547","price":33.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/106547XL.jpg?v=1789191586"},{"product_id":"ronstan-rf15202-series-15-double-ball-bearing-utility-block-with-loop-head","title":"Ronstan RF15202 Series 15 Double Ball Bearing Utility Block with Loop Head","description":"\u003cp\u003e\u003cstrong\u003eSeries 15 Ball Bearing Utility Block - Double, Loop Head\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSmallest and lightest ball bearing block available\u003c\/li\u003e\n\u003cli\u003ePrecision molded acetal sheave running on stainless steel ball bearings provide high performance  low friction\u003c\/li\u003e\n\u003cli\u003eSingle loop head blocks include an O-ring to separate running line from head lashing or fixing\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eApplications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eDinghy control lines\u003c\/li\u003e\n\u003cli\u003eVangs, cunninghams and tweakers\u003c\/li\u003e\n\u003cli\u003eShock cord tensioning systems\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eMaterials:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBB sheaves: UV stabilized acetal\u003c\/li\u003e\n\u003cli\u003eBall bearings: Stainless steel\u003c\/li\u003e\n\u003cli\u003eCheeks: Grade 316 stainless steel\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":44881665785945,"sku":"71027","price":40.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/71027XL.jpg?v=1789193140"},{"product_id":"ronstan-rf15174-series-15-ball-bearing-utility-block-pivoting-lead-block","title":"Ronstan RF15174 Series 15 Ball Bearing Utility Block – Pivoting Lead Block","description":"\u003cp\u003e\u003cstrong\u003eSeries 15 Ball Bearing Utility Block - Pivoting Lead Block\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSmallest and lightest ball bearing block available\u003c\/li\u003e\n\u003cli\u003ePrecision molded acetal sheave running on stainless steel ball bearings provide high performance  low friction\u003c\/li\u003e\n\u003cli\u003eSingle loop head blocks include an O-ring to separate running line from head lashing or fixing\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eFeaturing a 4-point fastening for load distribution and low profile. Can be mounted without disassembly.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eApplications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eDinghy control lines\u003c\/li\u003e\n\u003cli\u003eVangs, cunninghams and tweakers\u003c\/li\u003e\n\u003cli\u003eShock cord tensioning systems\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eMaterials:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBB sheaves: UV stabilized acetal\u003c\/li\u003e\n\u003cli\u003eBall bearings: Stainless steel\u003c\/li\u003e\n\u003cli\u003eCheeks: Grade 316 stainless steel\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":44881666146393,"sku":"71025","price":53.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/71025XL.jpg?v=1789193203"},{"product_id":"ronstan-rf15101-series-15-ball-bearing-utility-block-single-block-with-loop-head","title":"Ronstan RF15101 Series 15 Ball Bearing Utility Block – Single Block with Loop Head","description":"\u003cp\u003e\u003cstrong\u003eSeries 15 Ball Bearing Utility Block - Single Block, Loop Head\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSmallest and lightest ball bearing block available\u003c\/li\u003e\n\u003cli\u003ePrecision molded acetal sheave running on stainless steel ball bearings provide high performance  low friction\u003c\/li\u003e\n\u003cli\u003eSingle loop head blocks include an O-ring to separate running line from head lashing or fixing\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eApplications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eDinghy control lines\u003c\/li\u003e\n\u003cli\u003eVangs, cunninghams and tweakers\u003c\/li\u003e\n\u003cli\u003eShock cord tensioning systems\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eMaterials:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBB sheaves: UV stabilized acetal\u003c\/li\u003e\n\u003cli\u003eBall bearings: Stainless steel\u003c\/li\u003e\n\u003cli\u003eCheeks: Grade 316 stainless steel\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":44881666441305,"sku":"71020","price":28.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/71020XL.jpg?v=1789193232"},{"product_id":"ronstan-rf20141-series-20-single-ball-bearing-block-with-stand-up-loop-top","title":"Ronstan RF20141 Series 20 Single Ball Bearing Block with Stand-Up Loop Top","description":"\u003cp\u003e\u003cstrong\u003eSeries 20 Ball Bearing Block- Single, Stand-Up Loop Top\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eLow friction\u003c\/li\u003e\n\u003cli\u003eHigh static and dynamic load capacity\u003c\/li\u003e\n\u003cli\u003eLightweight\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003ePrecision molded Acetal sheaves running on stainless steel or Torlon ball bearings provide high performance  low friction.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eApplications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eDinghy control lines\u003c\/li\u003e\n\u003cli\u003eDinghy vangs\u003c\/li\u003e\n\u003cli\u003eCunninghams\u003c\/li\u003e\n\u003cli\u003eTraveler controls\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eMaterials:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eStainless steel ball bearings\u003c\/li\u003e\n\u003cli\u003eUV stabilized Acetal sheave\u003c\/li\u003e\n\u003cli\u003eGrade 316 stainless steel load strap and head fitting\u003c\/li\u003e\n\u003cli\u003eImpact and UV resistant, fiber reinforced Nylon cheeks\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":44881668669529,"sku":"70783","price":37.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/70783XL.jpg?v=1789193467"},{"product_id":"ronstan-series-50-all-purpose-fiddle-block-with-becket-and-cleat-rf51530","title":"Ronstan Series 50 All Purpose Fiddle Block with Becket and Cleat RF51530","description":"\u003cp\u003e\u003cstrong\u003eSeries 50 All Purpose Block - Fiddle - Becket - Cleat\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eExceptionally high working loads\u003c\/li\u003e\n\u003cli\u003eLow maintenance, long service life\u003c\/li\u003e\n\u003cli\u003eSelf-lubricating Acetal polymer sheave ensures low friction and extreme durability\u003c\/li\u003e\n\u003cli\u003eCaptive Lock universal head\u003c\/li\u003e\n\u003cli\u003eSlotted pin shackle eliminates fouled lines\u003c\/li\u003e\n\u003cli\u003eSnap fit removable becket pin\u003c\/li\u003e\n\u003cli\u003eMulti-position cleat arm\u003c\/li\u003e\n\u003cli\u003eSpare Parts - RF51010 Replacement Becket Pin, RF150 Shackle\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eAll purpose (AP) blocks are a great all around solution. Self-lubricating Acetal polymer sheaves running on polished stainless steel races perform equally well with dynamic loads and high static loads. For durability and a long service life, these blocks are the right choice for sheets, halyards and control line applications for cruising and racing.Captive Lock universal head can be fixed in either of two planes, or free to swivel as required. Quick adjusting cleat arms require no tools to adjust and fix securely in position. Becket pin is removable so line can be spliced prior to fitting and is \u003cstrong\u003ei\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAppllications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eMainsheet and halyard applications, vang and spinnaker control lines on boats to 10m (33ft)\u003c\/li\u003e\n\u003cli\u003eS60 - on boats up to 12m (40ft)\u003c\/li\u003e\n\u003cli\u003eIdeal for fine-tune mainsheet tackles, cunninghams, backstays and other control line purchase systems.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eMaterials:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eGrade 316 stainless steel load strap\u003c\/li\u003e\n\u003cli\u003eImpact and UV resistant, fiber reinforced Nylon cheeks\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\n\u003cp\u003eThe Ronstan Series 50 All Purpose Fiddle Block with Becket and Cleat RF51530 is a versatile sailboat control-line block designed for cruising and racing applications. It provides a practical solution for mainsheets, halyards, vangs, spinnaker controls, and other purchase systems where dependable handling, high working loads, and easy adjustment are important.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eIts self-lubricating Acetal polymer sheave runs on polished stainless steel races to help reduce friction while supporting durability under both dynamic and high static loads. The Captive Lock universal head can be fixed in either of two planes or allowed to swivel as needed, giving sailors flexibility when routing lines and configuring onboard hardware. The multi-position cleat arm adjusts quickly without tools and secures firmly in place for convenient line control.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eThe removable becket pin allows line splicing before installation, while the slotted pin shackle helps reduce the chance of fouled lines. Built with a Grade 316 stainless steel load strap and impact- and UV-resistant, fiber-reinforced Nylon cheeks, this Ronstan Series 50 block is suited to mainsheet and halyard applications on boats up to 33 feet, as well as vang, spinnaker control, fine-tune mainsheet tackle, Cunningham, backstay, and other control-line systems. For larger boats up to 40 feet, Ronstan identifies the Series 60 as the appropriate option.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\u003cbr\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-load performance:\u003c\/strong\u003e Designed for applications requiring exceptionally high working loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow-friction sheave:\u003c\/strong\u003e Self-lubricating Acetal polymer sheave runs on polished stainless steel races.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCaptive Lock universal head:\u003c\/strong\u003e Fixes in two planes or swivels as required for flexible installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable cleat arm:\u003c\/strong\u003e Multi-position arm adjusts without tools and locks securely in position.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-friendly hardware:\u003c\/strong\u003e Slotted pin shackle helps prevent fouled lines, and the removable becket pin supports pre-installation splicing.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eProduct Details\u003c\/strong\u003e\u003c\/p\u003e\u003cbr\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Ronstan\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e 50 All Purpose\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e RF51530\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Fiddle block with becket and cleat\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLoad strap:\u003c\/strong\u003e Grade 316 stainless steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCheeks:\u003c\/strong\u003e Impact- and UV-resistant, fiber-reinforced Nylon\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplacement parts:\u003c\/strong\u003e RF51010 replacement becket pin and RF150 shackle\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntended use:\u003c\/strong\u003e Sailboat sheets, halyards, vangs, spinnaker controls, and control-line purchase systems\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\u003cp\u003eChoose the Ronstan RF51530 Series 50 All Purpose Block for versatile, serviceable line control on cruising and racing sailboats.\u003c\/p\u003e\u003cbr\u003eSEO META DESCRIPTION:\u003cbr\u003eRonstan RF51530 Series 50 fiddle block with becket and cleat delivers versatile, low-friction line control for cruising and racing sailboats.\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eHigh-load performance: Designed for applications requiring exceptionally high working loads.\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eLow-friction sheave: Self-lubricating Acetal polymer sheave runs on polished stainless steel races.\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eCaptive Lock universal head: Fixes in two planes or swivels as required for flexible installation.\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eAdjustable cleat arm: Multi-position arm adjusts without tools and locks securely in position.\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eLine-friendly hardware: Slotted pin shackle helps prevent fouled lines, and the removable becket pin supports pre-installation splicing.\u003c\/li\u003e\u003c\/ul\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\n\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cbr\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":44881668800601,"sku":"70688","price":141.97,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/70688XL.jpg?v=1789193492"},{"product_id":"ronstan-rf51510-series-50-all-purpose-fiddle-becket-block","title":"Ronstan RF51510 Series 50 All Purpose Fiddle Becket Block","description":"\u003cp\u003e\u003cstrong\u003eSeries 50 All Purpose Block - Fiddle - Becket\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eExceptionally high working loads\u003c\/li\u003e\n\u003cli\u003eLow maintenance, long service life\u003c\/li\u003e\n\u003cli\u003eSelf-lubricating Acetal polymer sheave ensures low friction and extreme durability\u003c\/li\u003e\n\u003cli\u003eCaptive Lock universal head\u003c\/li\u003e\n\u003cli\u003eSlotted pin shackle eliminates fouled lines\u003c\/li\u003e\n\u003cli\u003eSnap fit removable becket pin\u003c\/li\u003e\n\u003cli\u003eSpare Parts - RF51010 Replacement Becket Pin, RF150 Shackle\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eAll purpose (AP) blocks are a great all around solution. Self-lubricating Acetal polymer sheaves running on polished stainless steel races perform equally well with dynamic loads and high static loads. For durability and a long service life, these blocks are the right choice for sheets, halyards and control line applications for cruising and racing.Captive Lock universal head can be fixed in either of two planes, or free to swivel as required. Becket pin is removable so line can be spliced prior to fitting and is ingeniously locked into position without the use of a clevis pin, split ring or tools\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eApplications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eMainsheet and halyard applications, vang and spinnaker control lines on boats to 10m (33ft)\u003c\/li\u003e\n\u003cli\u003eS60 - on boats up to 12m (40ft)\u003c\/li\u003e\n\u003cli\u003eIdeal for fine-tune mainsheet tackles, cunninghams, backstays and other control line purchase systems.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eMaterials:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eGrade 316 stainless steel load strap\u003c\/li\u003e\n\u003cli\u003eImpact and UV resistant, fiber reinforced Nylon cheeks\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\n\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cbr\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":44881668898905,"sku":"70687","price":86.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/70687XL.jpg?v=1789193512"},{"product_id":"ronstan-rf51300-series-50-all-purpose-triple-block-for-sailboat-sheets-halyards-and-control-lines","title":"Ronstan RF51300 Series 50 All Purpose Triple Block for Sailboat Sheets, Halyards and Control Lines","description":"\u003cp\u003e\u003cstrong\u003eSeries 50 All Purpose\u003c\/strong\u003e\u003cstrong\u003eBlock - Triple\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eExceptionally high working loads\u003c\/li\u003e\n\u003cli\u003eLow maintenance, long service life\u003c\/li\u003e\n\u003cli\u003eSelf-lubricating Acetal polymer sheave ensures low friction and extreme durability\u003c\/li\u003e\n\u003cli\u003eSlotted pin shackle eliminates fouled lines\u003c\/li\u003e\n\u003cli\u003eLockable swiveling head post\u003c\/li\u003e\n\u003cli\u003eSnap fit removable becket pin\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eAll purpose (AP) blocks are a great all around solution. Self-lubricating Acetal polymer sheaves running on polished stainless steel races perform equally well with dynamic loads and high static loads. For durability and a long service life, these blocks are the right choice for sheets, halyards and control line applications for cruising and racing.Head can be locked at 0 or 90 by engaging the grub screw in either the 0 or 90 degree position.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eApplications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eMainsheet and halyard applications, vang and spinnaker control lines on boats to 10m (33ft)\u003c\/li\u003e\n\u003cli\u003eS60 - on boats up to 12m (40ft)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eMaterials:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eGrade 316 stainless steel load strap\u003c\/li\u003e\n\u003cli\u003eImpact and UV resistant, fiber reinforced Nylon cheeks\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\n\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cbr\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":44881668997209,"sku":"70685","price":118.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/70685XL.jpg?v=1789193533"},{"product_id":"ronstan-series-50-all-purpose-double-block-rf51200-with-swivel-shackle","title":"Ronstan Series 50 All Purpose Double Block RF51200 with Swivel Shackle","description":"\u003cp\u003e\u003cstrong\u003eSeries 50 All Purpose Block - Double\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eAll purpose (AP) blocks are a great all around solution. Self-lubricating Acetal polymer sheaves running on polished stainless steel races perform equally well with dynamic loads and high static loads. For durability and a long service life, these blocks are the right choice for sheets, halyards and control line applications for cruising and racing. Swivel shackle head for full 360 degree rotation (non-locking).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eExceptionally high working loads\u003c\/li\u003e\n\u003cli\u003eLow maintenance  long service life\u003c\/li\u003e\n\u003cli\u003eSelf-lubricating Acetal polymer sheave ensures low friction and extreme durability\u003c\/li\u003e\n\u003cli\u003eSlotted pin shackle eliminates fouled lines\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eApplications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eMainsheet and halyard applications, vang and spinnaker control lines on boats to (33ft). 10m\u003c\/li\u003e\n\u003cli\u003eS60 - on boats up to 40ft, (12m)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eMaterials:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eGrade 316 stainless steel load strap\u003c\/li\u003e\n\u003cli\u003eImpact and UV resistant, fiber reinforced Nylon cheeks\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSheave Diameter: (inch) 2\" \/ (mm) 50\u003c\/li\u003e\n\u003cli\u003eMax Rope Diameter: (inch) 1\/2\" \/ (mm) 12\u003c\/li\u003e\n\u003cli\u003ePin Diameter: (inch) 1\/4\" \/ (mm) 6\u003c\/li\u003e\n\u003cli\u003eMaximum Working Load: (lb) 2200 \/ (kg) 1000\u003c\/li\u003e\n\u003cli\u003eBreaking Load: (lb) 4410 \/ (kg) 2000\u003c\/li\u003e\n\u003cli\u003eWeight: (oz) 9.0 \/ (g) 255\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\n\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cbr\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":44881669357657,"sku":"70683","price":88.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/70683XL.jpg?v=1789193562"},{"product_id":"ronstan-series-50-all-purpose-single-stand-up-block-rf51140","title":"Ronstan Series 50 All Purpose Single Stand-Up Block RF51140","description":"\u003cp\u003e\u003cstrong\u003eSeries 50 All Purpose Block - Single Stand Up\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eExceptionally high working loads\u003c\/li\u003e\n\u003cli\u003eLow maintenance, long service life\u003c\/li\u003e\n\u003cli\u003eSelf-lubricating Acetal polymer sheave ensures low friction and extreme durability\u003c\/li\u003e\n\u003cli\u003eCaptive Lock universal head\u003c\/li\u003e\n\u003cli\u003eSlotted pin shackle eliminates fouled lines\u003c\/li\u003e\n\u003cli\u003eMount with 2 x 5mm (3\/6\") fasteners (not supplied)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eAll purpose (AP) blocks are a great all around solution. Self-lubricating Acetal polymer sheaves running on polished stainless steel races perform equally well with dynamic loads and high static loads. For durability and a long service life, these blocks are the right choice for sheets, halyards and control line applications for cruising and racing.Captive Lock universal head can be fixed in either of two planes, or free to swivel as required. Quick adjusting cleat arms require no tools to adjust and fix securely in position. Becket pin is removable so line can be spliced prior to fitting.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eApplications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eMainsheet and halyard applications, vang and spinnaker control lines on boats to 10m (33ft)\u003c\/li\u003e\n\u003cli\u003eS60 - on boats up to 12m (40ft)\u003c\/li\u003e\n\u003cli\u003eTypically used in direct 4:1 purchase systems such as mainsheets and boom vangs\u003c\/li\u003e\n\u003cli\u003eOn larger boats they are used for fine-tune mainsheet tackles, outhauls, cunninghams, checkstays, genoa lead pullers and traveller controls.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eMaterials:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eGrade 316 stainless steel load strap\u003c\/li\u003e\n\u003cli\u003eImpact and UV resistant, fiber reinforced Nylon cheeks\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\n\u003cp\u003e\u003cstrong\u003eRonstan Series 50 All Purpose Single Stand-Up Block RF51140\u003c\/strong\u003e is a versatile sailing hardware solution for cruising and racing applications. Designed for mainsheets, halyards, vangs, spinnaker control lines, and other deck hardware systems, this single stand-up block combines high working loads, low friction, and durable construction for dependable line handling on boats up to 33 feet.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eThe self-lubricating Acetal polymer sheave runs on polished stainless steel races to support smooth operation under both dynamic and high static loads. Its construction is suited to demanding sheet, halyard, and control-line applications, while the impact- and UV-resistant fiber-reinforced Nylon cheeks help support a long service life with minimal maintenance. The removable becket pin also allows line splicing before installation.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cbr\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature:\u003c\/strong\u003e Self-lubricating Acetal polymer sheave delivers low friction and high durability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature:\u003c\/strong\u003e Polished stainless steel races support smooth performance with dynamic and static loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature:\u003c\/strong\u003e Captive Lock universal head can be fixed in either of two planes or allowed to swivel as needed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature:\u003c\/strong\u003e Slotted pin shackle helps reduce the chance of fouled lines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature:\u003c\/strong\u003e Quick-adjusting cleat arms require no tools and secure firmly in position.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature:\u003c\/strong\u003e Removable becket pin allows line splicing before fitting.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eProduct Details:\u003c\/strong\u003e\u003c\/p\u003e\u003cbr\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Ronstan\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e 50 All Purpose\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e RF51140\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlock Type:\u003c\/strong\u003e Single stand-up block\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLoad Strap:\u003c\/strong\u003e Grade 316 stainless steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCheeks:\u003c\/strong\u003e Impact- and UV-resistant fiber-reinforced Nylon\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplications:\u003c\/strong\u003e Mainsheets, halyards, boom vangs, spinnaker control lines, outhauls, cunninghams, checkstays, genoa lead pullers, and traveler controls\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended Boat Size:\u003c\/strong\u003e Boats up to 33 feet\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Requires fasteners, which are not supplied\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\u003cp\u003eChoose the Ronstan Series 50 All Purpose Single Stand-Up Block RF51140 for a durable, adaptable addition to your sailing control-line system.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eSEO META DESCRIPTION:\u003c\/strong\u003e\u003cbr\u003eShop the Ronstan Series 50 All Purpose Single Stand-Up Block RF51140 for durable sheet, halyard, and control-line handling on boats up to 33 feet.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eSelf-lubricating Acetal polymer sheave delivers low friction and high durability.\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003ePolished stainless steel races support smooth performance with dynamic and static loads.\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eCaptive Lock universal head can be fixed in either of two planes or allowed to swivel as needed.\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eSlotted pin shackle helps reduce the chance of fouled lines.\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eQuick-adjusting cleat arms require no tools and secure firmly in position.\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eRemovable becket pin allows line splicing before fitting.\u003c\/li\u003e\u003c\/ul\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\n\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cbr\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":44881669455961,"sku":"70680","price":63.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/70680XL.jpg?v=1789193593"},{"product_id":"ronstan-rf45130-series-40-ball-bearing-orbit-block-single-becket-with-cleat-and-swivel-head","title":"Ronstan RF45130 Series 40 Ball Bearing Orbit Block, Single Becket with Cleat and Swivel Head","description":"\u003cp\u003e\u003cstrong\u003eSeries 40 Ball Bearing Orbit Block - Single - Becket - Cleat - Swivel Head\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eUltra Lightweight\u003c\/li\u003e\n\u003cli\u003eLow friction 2-stage Orbital ball bearing system\u003c\/li\u003e\n\u003cli\u003eHighest working load in its class\u003c\/li\u003e\n\u003cli\u003eLow profile and compact\u003c\/li\u003e\n\u003cli\u003eHigh performance cleating\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eLightweight\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eKilogram for kilogram of working load, BB and RT Orbit Blocks are the worlds lightest. The unique orbital design allows the bearing to only be in the active areas of the floating sheave. This minimizes the mass of the inactive return race and hub.\u003c\/p\u003e\u003cp\u003eWeight and bulk are further reduced in the different block configurations. The ball bearing single and becket block has a through-sheave becket arrangement. The result The lowest weight possible.\u003c\/p\u003e\u003cp\u003eMulti-sheave blocks have only single intermediate cheeks and an ultra-light and efficient head arrangement. This gives a 30% weight saving advantage over the nearest competitor. Other brands just link together their single blocks. This results in unnecessary double cheeks between each sheave, held together by a heavy steel channel across the top of the block.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHighest Working Load In It's Class\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe orbital ball-bearing arrangement gives the largest possible bearing race diameter. This maximizes load performance. The proven Ronstan 2-stage bearing system features high compression grade acetal ball bearings and a secondary full-contact bearing. This gives minimum friction across the full working load range.\u003c\/p\u003e\u003cp\u003eThe floating sheave and bearing system is supported by a fiber-reinforced load frame. The design was computer modeled to be stress optimized.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eApplications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eMainsheet systems on spinnaker sheet on dinghies to 5m (16ft)\u003c\/li\u003e\n\u003cli\u003eSpinnaker sheets on dinghies, sportsboats and small keel boats to 5m (16ft)\u003c\/li\u003e\n\u003cli\u003eHalyard, vang and backstay applications on boats to 8m (26ft)\u003c\/li\u003e\n\u003cli\u003eControl line applications on larger yachts\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eMaterials:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBall Bearings - High compression strength carbon black Acetal.\u003c\/li\u003e\n\u003cli\u003eStage 2 Bearing - Glass fibre reinforced, MoS2 impregnated Nylon\u003c\/li\u003e\n\u003cli\u003eFrame\/Cheeks - Toughened, glass fibre reinforced Nylon\u003c\/li\u003e\n\u003cli\u003eSheave - Carbon fiber reinforced, PTFE impregnated Nylon\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":44881669587033,"sku":"70624","price":109.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/70624XL.jpg?v=1789193630"},{"product_id":"ronstan-series-40-ball-bearing-fiddle-block-with-becket-and-cleat-rf40530","title":"Ronstan Series 40 Ball Bearing Fiddle Block with Becket and Cleat, RF40530","description":"\u003cp\u003e\u003cstrong\u003eSeries 40 Ball Bearing Block - Fiddle - Becket - Cleat\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eLow friction Acetal or Torlon bearing system\u003c\/li\u003e\n\u003cli\u003eLightweight\u003c\/li\u003e\n\u003cli\u003eCheek cut-outs for easy bearing maintenance\u003c\/li\u003e\n\u003cli\u003eCaptive Lock universal head\u003c\/li\u003e\n\u003cli\u003eSlotted pin shackle eliminates fouled lines\u003c\/li\u003e\n\u003cli\u003eSnap fit removable becket pin\u003c\/li\u003e\n\u003cli\u003eMulti-position cleat arm\u003c\/li\u003e\n\u003cli\u003eLow friction, 2-stage ball bearing system\u003c\/li\u003e\n\u003cli\u003eHigh static and dynamic load capacity\u003c\/li\u003e\n\u003cli\u003eLightweight\u003c\/li\u003e\n\u003cli\u003eCheek cut-outs for easy bearing maintenance\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eSheaves running on Acetal or Torlon ball bearings provide high performance  low friction. The 2-stage ball bearing system provides consistent performance over the full load range.Captive Lock universal head can be fixed in either of two planes, or free to swivel as required. Quick adjusting cleat arms require no tools to adjust and fix securely in position. Becket pin is removable so line can be spliced prior to fitting and is i\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eApplications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eMainsheet\u003c\/li\u003e\n\u003cli\u003eHalyard\u003c\/li\u003e\n\u003cli\u003eVang\u003c\/li\u003e\n\u003cli\u003eSpinnaker control lines on off-the-beach catamarans, one design classes and sportsboats up to 8m (26ft)\u003c\/li\u003e\n\u003cli\u003eTypically used in direct 4:1 purchase systems such as mainsheets and boom vangs\u003c\/li\u003e\n\u003cli\u003eOn larger boats they are used for fine-tune mainsheet tackles, outhauls, cunninghams, checkstays, genoa lead pullers and traveller controls.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eMaterials:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eAcetal ball bearings\u003c\/li\u003e\n\u003cli\u003eUV stabilized Acetal sheave\u003c\/li\u003e\n\u003cli\u003eGrade 316 stainless steel load strap and head fitting\u003c\/li\u003e\n\u003cli\u003eImpact and UV resistant, fiber reinforced Nylon cheeks\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\n\u003cp\u003e\u003cstrong\u003eRonstan Series 40 Ball Bearing Fiddle Block with Becket and Cleat\u003c\/strong\u003e is designed for sailors who need reliable, low-friction control for mainsheets, halyards, vangs, and other line-handling applications. Model RF40530 combines a fiddle block, becket, and adjustable cleat in one compact assembly, making it a practical choice for direct 4:1 purchase systems and control lines on off-the-beach catamarans, one-design classes, sportsboats, and larger boats.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eIts two-stage Acetal or Torlon ball bearing system helps provide smooth, consistent operation across the load range. The lightweight construction supports efficient rigging without adding unnecessary bulk, while the high static and dynamic load capacity suits a variety of sailing control applications. Cheek cut-outs provide access for easier bearing maintenance, helping simplify routine care and service.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eThe Captive Lock universal head can be fixed in either of two planes or left free to swivel as required. A multi-position cleat arm adjusts quickly without tools and secures firmly in position, allowing the cleat to be configured for convenient line handling. The slotted pin shackle helps reduce the chance of fouled lines, and the snap-fit removable becket pin allows the line to be prepared before fitting.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eKEY FEATURES:\u003c\/strong\u003e\u003c\/p\u003e\u003cbr\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow-friction bearing system:\u003c\/strong\u003e Acetal or Torlon ball bearings support smooth, consistent performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFiddle block with becket and cleat:\u003c\/strong\u003e Combines multiple rigging functions for mainsheets, vangs, halyards, and control lines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCaptive Lock universal head:\u003c\/strong\u003e Can be fixed in two planes or allowed to swivel as required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable cleat arm:\u003c\/strong\u003e Multi-position design adjusts without tools and locks securely in place.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaintenance-friendly construction:\u003c\/strong\u003e Cheek cut-outs provide access to the bearing system.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine-management features:\u003c\/strong\u003e Slotted pin shackle and removable becket pin help simplify setup and reduce fouling concerns.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\u003cp\u003e\u003cstrong\u003ePRODUCT DETAILS:\u003c\/strong\u003e\u003c\/p\u003e\u003cbr\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Ronstan\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e Series 40\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e RF40530\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterials:\u003c\/strong\u003e Acetal ball bearings, UV-stabilized Acetal sheave, Grade 316 stainless steel load strap and head fitting, and impact- and UV-resistant fiber-reinforced nylon cheeks\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplications:\u003c\/strong\u003e Mainsheets, halyards, vangs, spinnaker control lines, outhauls, cunningham controls, checkstays, genoa lead pullers, and traveler controls\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTypical use:\u003c\/strong\u003e Direct 4:1 purchase systems, including mainsheets and boom vangs\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\u003cp\u003eChoose the Ronstan RF40530 Series 40 fiddle block when dependable low-friction control and flexible cleat positioning are important to your sailing setup.\u003c\/p\u003e\u003cbr\u003eSEO META DESCRIPTION:\u003cbr\u003eRonstan Series 40 RF40530 fiddle block with becket and cleat offers low-friction ball bearings, adjustable cleat positioning, and versatile sailing control.\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eLow-friction Acetal or Torlon two-stage ball bearing system\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eFiddle block with becket and multi-position cleat arm\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eCaptive Lock universal head with fixed or swiveling configurations\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eSlotted pin shackle helps reduce fouled lines\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eSnap-fit removable becket pin\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eCheek cut-outs for easier bearing maintenance\u003c\/li\u003e\u003c\/ul\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\n\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cbr\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":44881669718105,"sku":"70623","price":102.37,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/70623XL.jpg?v=1789193653"},{"product_id":"ronstan-rf40300-series-40-triple-ball-bearing-block-with-swivel-head","title":"Ronstan RF40300 Series 40 Triple Ball Bearing Block with Swivel Head","description":"\u003cp\u003e\u003cstrong\u003eSeries 40 Ball Bearing Block - Triple - Swivel Head\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eLow friction Acetal or Torlon bearing system\u003c\/li\u003e\n\u003cli\u003eLightweight\u003c\/li\u003e\n\u003cli\u003eCheek cut-outs for easy bearing maintenance\u003c\/li\u003e\n\u003cli\u003eFeatures a swivel shackle head for full 360 rotation\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eSheaves running on Acetal or Torlon ball bearings provide high performance  low friction. The 2-stage ball bearing system provides consistent performance over the full load range.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eApplications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eMainsheet\u003c\/li\u003e\n\u003cli\u003eHalyard\u003c\/li\u003e\n\u003cli\u003eVang\u003c\/li\u003e\n\u003cli\u003eSpinnaker control lines on off-the-beach catamarans, one design classes and sportsboats up to 8m (26ft)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eMaterials:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eAcetal ball bearings\u003c\/li\u003e\n\u003cli\u003eUV stabilised Acetal sheave\u003c\/li\u003e\n\u003cli\u003eGrade 316 stainless steel load strap and head fitting\u003c\/li\u003e\n\u003cli\u003eImpact and UV resistant, fiber reinforced Nylon cheeks\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":44881670668377,"sku":"70618","price":100.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/70618XL.jpg?v=1789193682"},{"product_id":"ronstan-rf40200-series-40-double-ball-bearing-block-with-swivel-head","title":"Ronstan RF40200 Series 40 Double Ball Bearing Block with Swivel Head","description":"\u003cp\u003e\u003cstrong\u003eSeries 40 Ball Bearing Block - Double - Swivel Head\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eLow friction Acetal or Torlon bearing system\u003c\/li\u003e\n\u003cli\u003eLightweight\u003c\/li\u003e\n\u003cli\u003eCheek cut-outs for easy bearing maintenance\u003c\/li\u003e\n\u003cli\u003eFeatures a swivel shackle head for full 360 rotation\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eSheaves running on Acetal or Torlon ball bearings provide high performance  low friction. The 2-stage ball bearing system provides consistent performance over the full load range.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eApplications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eMainsheet\u003c\/li\u003e\n\u003cli\u003eHalyard\u003c\/li\u003e\n\u003cli\u003eVang\u003c\/li\u003e\n\u003cli\u003eSpinnaker control lines on off-the-beach catamarans, one design classes and sportsboats up to 8m (26ft)\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":44881671225433,"sku":"70616","price":84.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/70616XL.jpg?v=1789193718"},{"product_id":"ronstan-rf40171-series-40-ball-bearing-block-single-upright-lead","title":"Ronstan RF40171 Series 40 Ball Bearing Block – Single Upright Lead","description":"\u003cp\u003e\u003cstrong\u003eSeries 40 Ball Bearing Block - Single Upright Lead\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eLead blocks are a low profile solution for leading halyards or other rig sail controls back to cleats or jammers. Precision molded Acetal sheaves running on Acetal or Torlon ball bearings provide high performance  low friction. The 2-stage ball bearing system provides consistent performance over the full load range.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eApplications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eTypically used for halyards at the mast base.\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eMaterials:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eAcetal ball bearings\u003c\/li\u003e\n\u003cli\u003eUV stabilized Acetal sheave\u003c\/li\u003e\n\u003cli\u003eGrade 316 stainless steel load housing\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":44881671258201,"sku":"70615","price":68.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/70615XL.jpg?v=1789193725"},{"product_id":"ronstan-rf41811-series-40-all-purpose-block-single-cheek","title":"Ronstan RF41811 Series 40 All Purpose Block, Single Cheek","description":"\u003cp\u003e\u003cstrong\u003eSeries 40 All Purpose Block - Single Cheek\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eExceptionally high working loads\u003c\/li\u003e\n\u003cli\u003eLow maintenance, long service life\u003c\/li\u003e\n\u003cli\u003eSelf-lubricating sheave\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eAll purpose (AP) blocks are a great all around solution. Self-lubricating Acetal polymer sheaves running on polished stainless steel races perform equally well with dynamic loads and high static loads. For durability and a long service life, these blocks are the right choice for sheets, halyards and control line applications for cruising and racing.Can be mounted on masts and booms using the curved surface adapter. Can be stacked to create a double version, but no more than 60% of the rated working load should be applied to the upper sheave. Stackable with Ronstan Series 40 deck organizers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eApplications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eMainsheet\u003c\/li\u003e\n\u003cli\u003eHalyard\u003c\/li\u003e\n\u003cli\u003eVang\u003c\/li\u003e\n\u003cli\u003eSpinnaker control lines on off-the-beach catamarans, one design classes and sportsboats up to 8m (26ft)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eMaterials:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eU.V. stabilised Acetal sheaves\u003c\/li\u003e\n\u003cli\u003eImpact and U.V. resistant, fiber reinforced Nylon cheeks\u003c\/li\u003e\n\u003cli\u003eGrade 316 stainless steel bearing race\u003c\/li\u003e\n\u003cli\u003eAlloy cheek plates\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":44881671323737,"sku":"70607","price":98.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/70607XL.jpg?v=1789193739"},{"product_id":"ronstan-rf41530-series-40-all-purpose-fiddle-becket-cleat-block","title":"Ronstan RF41530 Series 40 All Purpose Fiddle Becket Cleat Block","description":"\u003cp\u003e\u003cstrong\u003eSeries 40 All Purpose Block - Fiddle - Becket - Cleat\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eExceptionally high working loads\u003c\/li\u003e\n\u003cli\u003eLow maintenance, long service life\u003c\/li\u003e\n\u003cli\u003eSelf-lubricating sheave\u003c\/li\u003e\n\u003cli\u003eCaptive Lock universal head\u003c\/li\u003e\n\u003cli\u003eSlotted pin shackle eliminates fouled lines\u003c\/li\u003e\n\u003cli\u003eSnap fit removable becket pin\u003c\/li\u003e\n\u003cli\u003eMulti-position cleat arm\u003c\/li\u003e\n\u003cli\u003eSpare parts - RF41010 Replacement Becket Pin, RF150 Shackle\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eAll purpose (AP) blocks are a great all around solution. Self-lubricating Acetal polymer sheaves running on polished stainless steel races perform equally well with dynamic loads and high static loads. For durability and a long service life, these blocks are the right choice for sheets, halyards and control line applications for cruising and racing.Captive Lock universal head can be fixed in either of two planes, or free to swivel as required. Quick adjusting cleat arms require no tools to adjust and fix securely in position. Becket pin is removable so line can be spliced prior to fitting.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eApplications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eMainsheet\u003c\/li\u003e\n\u003cli\u003eHalyard\u003c\/li\u003e\n\u003cli\u003eVang\u003c\/li\u003e\n\u003cli\u003eSpinnaker control lines on off-the-beach catamarans, one design classes and sportsboats up to 8m (26ft)\u003c\/li\u003e\n\u003cli\u003eIdeal for fine-tune mainsheet tackles, cunninghams, backstays and other control line purchase systems.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eMaterials:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eU.V. stabilised Acetal sheaves\u003c\/li\u003e\n\u003cli\u003eImpact and U.V. resistant, fibre reinforced Nylon cheeks\u003c\/li\u003e\n\u003cli\u003eGrade 316 stainless steel bearing race\u003c\/li\u003e\n\u003cli\u003eGrade 316 stainless steel load strap and head fitting\u003c\/li\u003e\n\u003cli\u003eImpact and UV resistant, fiber reinforced Nylon cheeks\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":44881671389273,"sku":"70606","price":122.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/70606XL.jpg?v=1789193751"},{"product_id":"ronstan-rf41300-series-40-triple-all-purpose-block-with-swivel-head","title":"Ronstan RF41300 Series 40 Triple All Purpose Block with Swivel Head","description":"\u003cp\u003e\u003cstrong\u003eSeries 40 All Purpose Block - Triple - Swivel Head\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eExceptionally high working loads\u003c\/li\u003e\n\u003cli\u003eLow maintenance, long service life\u003c\/li\u003e\n\u003cli\u003eSelf-lubricating sheave\u003c\/li\u003e\n\u003cli\u003eSlotted pin shackle eliminates fouled lines\u003c\/li\u003e\n\u003cli\u003eTwo way head post\u003c\/li\u003e\n\u003cli\u003eSpare parts - RF41010 Replacement Becket Pin, RF150 Shackle\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eAll purpose (AP) blocks are a great all around solution. Self-lubricating Acetal polymer sheaves running on polished stainless steel races perform equally well with dynamic loads and high static loads. For durability and a long service life, these blocks are the right choice for sheets, halyards and control line applications for cruising and racing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eApplications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eMainsheet\u003c\/li\u003e\n\u003cli\u003eHalyard\u003c\/li\u003e\n\u003cli\u003eVang\u003c\/li\u003e\n\u003cli\u003eSpinnaker control lines on off-the-beach catamarans, one design classes and sportsboats up to 8m (26ft)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eMaterials:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eU.V. stabilised Acetal sheaves\u003c\/li\u003e\n\u003cli\u003eImpact and U.V. resistant, fibre reinforced Nylon cheeks\u003c\/li\u003e\n\u003cli\u003eGrade 316 stainless steel bearing race\u003c\/li\u003e\n\u003cli\u003eGrade 316 stainless steel load strap and head fitting\u003c\/li\u003e\n\u003cli\u003eSheave: UV stabilised acetal\u003c\/li\u003e\n\u003cli\u003eCheeks: Impact modified, fiber reinforced and UV stabilized nylon\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":44881671651417,"sku":"70600","price":93.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/70600XL.jpg?v=1789193766"},{"product_id":"ronstan-rf41200-series-40-double-all-purpose-block-with-full-swivel-head","title":"Ronstan RF41200 Series 40 Double All Purpose Block with Full Swivel Head","description":"\u003cb\u003eSeries 40 All Purpose Block - Double Block - Full Swivel Head\u003c\/b\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003eAll purpose (AP) blocks are a great all around solution. Self-lubricating Acetal polymer sheaves running on polished stainless steel races perform equally well with dynamic loads and high static loads. For durability and a long service life, these blocks are the right choice for sheets, halyards and control line applications for cruising and racing. Head swivels freely.\u003cbr\u003e\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003cbr\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eExceptionally high working loads\u003c\/li\u003e\n\u003cli\u003eLow maintenance, long service life\u003c\/li\u003e\n\u003cli\u003eSelf-lubricating sheave\u003c\/li\u003e\n\u003cli\u003eSlotted pin shackle eliminates fouled lines\u003c\/li\u003e\n\u003cli\u003eTwo way head post\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cb\u003eApplications:\u003c\/b\u003e\u003cbr\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eMainsheet\u003c\/li\u003e\n\u003cli\u003eHalyard\u003c\/li\u003e\n\u003cli\u003eVang\u003c\/li\u003e\n\u003cli\u003eSpinnaker control lines on off-the-beach catamarans, one design classes and sportsboats up to 8M(26')\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cb\u003eMaterials:\u003c\/b\u003e\u003cbr\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eU.V. stabilized Acetal sheaves\u003c\/li\u003e\n\u003cli\u003eImpact and U.V. resistant, fiber reinforced Nylon cheeks\u003c\/li\u003e\n\u003cli\u003eGrade 316 stainless steel bearing race\u003c\/li\u003e\n\u003cli\u003eGrade 316 stainless steel load strap and head fitting\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cb\u003eSpecifications:\u003c\/b\u003e\u003cbr\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSheave : 40mm(1-9\/16\")\u003c\/li\u003e\n\u003cli\u003eMax. Rope : 10mm(7\/16\")\u003c\/li\u003e\n\u003cli\u003ePin : 5mm(3\/16\")\u003c\/li\u003e\n\u003cli\u003eM.W.L.: 600kg(1,320lbs)\u003c\/li\u003e\n\u003cli\u003eB. L.: 1,200kg(2,650lbs)\u003c\/li\u003e\n\u003cli\u003eWeight: 135g(4.8oz)\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":44881686921305,"sku":"65757","price":67.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/65757XL.jpg?v=1789194439"},{"product_id":"ronstan-rf50101-series-50-ball-bearing-block-with-single-loop-top-2-inch-sheave","title":"Ronstan RF50101 Series 50 Ball Bearing Block with Single Loop Top, 2-Inch Sheave","description":"\u003cp\u003e\u003cstrong\u003eSeries 50 Ball Bearing Block - Single Loop Top\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eSheaves running on Acetal or Torlon ball bearings provide high performance  low friction. The 2-stage ball bearing system provides consistent performance over the full load range.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli id=\"isPasted\"\u003eLow friction, 2-stage ball bearing system\u003c\/li\u003e\n\u003cli\u003eHigh static and dynamic load capacity\u003c\/li\u003e\n\u003cli\u003eLightweight\u003c\/li\u003e\n\u003cli\u003eCheek cut-outs for easy bearing maintenance\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli id=\"isPasted\"\u003eMax. Rope diameter (in): 1\/2\u003c\/li\u003e\n\u003cli\u003eM.W.L. (lb): 1100lbs\u003c\/li\u003e\n\u003cli\u003eSheave diameter (in): 2\u003c\/li\u003e\n\u003cli\u003eB.L. (lb): 3310lbs\u003c\/li\u003e\n\u003cli\u003eWeight (oz): 3.4oz\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eMaterials:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eAcetal ball bearings\u003c\/li\u003e\n\u003cli\u003eUV-stabilized acetal sheave\u003c\/li\u003e\n\u003cli\u003eGrade 316 stainless steel load strap and head fitting\u003c\/li\u003e\n\u003cli\u003eImpact and UV-resistant, fiber-reinforced nylon cheeks\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\n\u003cp\u003e\u003cstrong\u003eRonstan RF50101 Series 50 Ball Bearing Block with Single Loop Top\u003c\/strong\u003e delivers smooth, low-friction line handling for sailing and marine rigging applications. Designed for use with rope up to 1\/2 inch in diameter, this lightweight single-loop-top block combines a two-stage ball bearing system with durable marine-grade materials for consistent performance across its rated load range.\u003c\/p\u003e\u003cp\u003eThe Acetal ball bearings and UV-stabilized Acetal sheave help support efficient operation, while the Grade 316 stainless steel load strap and head fitting provide a robust connection point. Impact- and UV-resistant, fiber-reinforced nylon cheeks help protect the assembly in demanding marine environments. Cheek cut-outs also make bearing maintenance easier, helping simplify servicing when needed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eLow-friction, two-stage ball bearing system for consistent performance over the full load range\u003c\/li\u003e\n\u003cli\u003eHigh static and dynamic load capacity for demanding line-handling applications\u003c\/li\u003e\n\u003cli\u003eLightweight construction for easier installation and reduced rigging weight\u003c\/li\u003e\n\u003cli\u003eCheek cut-outs provide convenient access for bearing maintenance\u003c\/li\u003e\n\u003cli\u003eSingle loop top configuration for straightforward attachment\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eProduct Details:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBrand: Ronstan\u003c\/li\u003e\n\u003cli\u003ePart number: RF50101\u003c\/li\u003e\n\u003cli\u003eProduct type: Series 50 single-loop-top ball bearing block\u003c\/li\u003e\n\u003cli\u003eMaximum rope diameter: 1\/2 inch\u003c\/li\u003e\n\u003cli\u003eSheave diameter: 2 inches\u003c\/li\u003e\n\u003cli\u003eMaximum working load: 1,100 pounds\u003c\/li\u003e\n\u003cli\u003eBreaking load: 3,310 pounds\u003c\/li\u003e\n\u003cli\u003eWeight: 3.4 ounces\u003c\/li\u003e\n\u003cli\u003eBall bearing material: Acetal\u003c\/li\u003e\n\u003cli\u003eSheave material: UV-stabilized Acetal\u003c\/li\u003e\n\u003cli\u003eLoad strap and head fitting: Grade 316 stainless steel\u003c\/li\u003e\n\u003cli\u003eCheek material: Impact- and UV-resistant, fiber-reinforced nylon\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eChoose the Ronstan RF50101 Series 50 Ball Bearing Block when you need a compact, lightweight marine block with smooth operation, durable materials, and practical bearing maintenance access.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSEO Meta Description:\u003c\/strong\u003e Ronstan RF50101 Series 50 ball bearing block with a single loop top, 2-inch sheave, low-friction operation, and 1,100-pound working load.\u003c\/p\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\n\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cbr\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":44934324060249,"sku":"105700","price":61.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/105700XL.jpg?v=1789760055"},{"product_id":"harken-3226-57mm-aluminum-low-load-black-magic-swivel-block","title":"Harken 3226 57mm Aluminum Low-Load Black Magic Swivel Block","description":"\u003cp\u003e\u003cstrong\u003e57mm Aluminum Low Load Black Magic Block with Swivel\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eBlack Magic Air blocks are a top favorite of Big Boat performance racers and cruisers. These lightweight, free-running, powerful performers are used for sail controls that see lots of action: mainsheet, runner, halyard, and spinnaker systems. A center cage keeps Torlon roller bearings separated and parallel to reduce friction. Shackle blocks lock in two directions or swivel to keep the line from twisting. Low-load blocks have red isolators. They use Torlon rollers and 316 stainless steel shackles. Standard blocks have 17-4 PH stainless head posts. Torlon is a registered trademark of Solvay Advanced Polymers L.L.C.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSheave: 57mm\/2-1\/4in\u003c\/li\u003e\n\u003cli\u003eLength: 119mm\/4-11\/16in\u003c\/li\u003e\n\u003cli\u003eWeight: 154g\/5.44oz\u003c\/li\u003e\n\u003cli\u003eShackle Pin: 6mm\/1\/4in\u003c\/li\u003e\n\u003cli\u003eMaximum Line: 12mm \/ 7\/16in\u003c\/li\u003e\n\u003cli\u003eMaximum Working Load: 7\/16kg \/ 1655lbs\u003c\/li\u003e\n\u003cli\u003eBreaking Load: 1500kg \/ 3300lb\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\n\u003cp\u003e\u003cstrong\u003eHarken 3226 57mm Aluminum Low-Load Black Magic Swivel Block\u003c\/strong\u003e is designed for sailors who need smooth, dependable line handling in active sail-control systems. Built for big-boat performance racing and cruising, this lightweight block is well suited for mainsheet, runner, halyard, and spinnaker applications where reduced friction and reliable movement matter.\u003c\/p\u003e\u003cp\u003eThe Harken Black Magic Air block uses Torlon roller bearings held in parallel by a center cage to help reduce friction during operation. Its swivel configuration allows the block to align with changing line direction, helping limit line twisting. The shackle can lock in two directions or swivel as needed, while the aluminum construction and 316 stainless steel shackle provide a durable solution for demanding marine rigging applications. As a low-load model, it features red isolators.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature: Lightweight aluminum construction\u003c\/strong\u003e — Helps provide a practical balance of strength and reduced weight for sail-control systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature: Torlon roller bearings\u003c\/strong\u003e — Center-caged rollers stay separated and parallel to help reduce friction.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature: Swivel and locking shackle function\u003c\/strong\u003e — Allows the block to swivel or lock in two directions for flexible installation and line alignment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature: 316 stainless steel shackle\u003c\/strong\u003e — Provides a robust connection for marine rigging use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature: Low-load design with red isolators\u003c\/strong\u003e — Identifies this block for low-load applications.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eProduct Details\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Harken\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e 3226\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlock type:\u003c\/strong\u003e 57mm aluminum low-load Black Magic block with swivel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSheave:\u003c\/strong\u003e 2-1\/4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall length:\u003c\/strong\u003e 4-11\/16 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 5.44 ounces\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShackle pin:\u003c\/strong\u003e 1\/4 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum line size:\u003c\/strong\u003e 7\/16 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum working load:\u003c\/strong\u003e 1,655 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBreaking load:\u003c\/strong\u003e 3,300 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBearing material:\u003c\/strong\u003e Torlon roller bearings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShackle material:\u003c\/strong\u003e 316 stainless steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntended applications:\u003c\/strong\u003e Mainsheet, runner, halyard, and spinnaker systems\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eChoose the Harken 3226 Black Magic swivel block for lightweight, low-friction performance in active marine sail-control applications.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eTorlon is a registered trademark of Solvay Advanced Polymers L.L.C.\u003c\/em\u003e\u003c\/p\u003e\u003ch3\u003eSEO Meta Description\u003c\/h3\u003e\u003cp\u003eShop the Harken 3226 57mm aluminum low-load swivel block with Torlon bearings for smooth line handling in mainsheet, halyard, and spinnaker systems.\u003c\/p\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\n\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cbr\u003e","brand":"Harken","offers":[{"title":"Default Title","offer_id":44937011265625,"sku":"93959","price":211.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/93959XL.jpg?v=1789835574"},{"product_id":"harken-60mm-element-triple-block-part-6275-1-2-inch-line-capacity","title":"Harken 60mm Element Triple Block, Part 6275, 1\/2-Inch Line Capacity","description":"\u003cp\u003e\u003cstrong\u003e60mm Element Triple Block\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eElement blocks introduce sideplates that combine forged aluminum and compound curves for strength. They are simultaneously contemporary and very robust. Elements design pairs the minimum amount of metal required to protect the sheave with a proven journal bearing. So size for size, Element is priced significantly lower, than our previously least expensive blocks. Sideplates are hard-coat-anodized to resist corrosion. A tough composite bearing sheave resists corrosion for long service life.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSheave: 60mm \/ 2-3\/8in.\u003c\/li\u003e\n\u003cli\u003eLength: 165mm \/ 6-1\/2in.\u003c\/li\u003e\n\u003cli\u003eWeight: 710g \/ 24.9oz\u003c\/li\u003e\n\u003cli\u003eShackle Pin: 8mm \/ 5\/16in\u003c\/li\u003e\n\u003cli\u003eMaximum Line: 12mm\/ 1\/2in\u003c\/li\u003e\n\u003cli\u003eMaximum working load: 816kg\/ 1799lb\u003c\/li\u003e\n\u003cli\u003eBreaking load: 1632kg \/ 3598lb\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\n\u003cp\u003eThe Harken 60mm Element Triple Block is a robust, corrosion-resistant sailing block designed for deck hardware systems that require efficient line handling and dependable load support. Part 6275 features three sheaves in a compact forged-aluminum and composite construction, making it suitable for marine applications where durable performance and practical value matter.\u003c\/p\u003e\u003cp\u003eThe Element design uses sideplates with forged aluminum and compound curves to provide strength while protecting the sheaves with only the metal required. A proven journal bearing supports smooth, reliable operation, while the tough composite bearing sheave resists corrosion for long service life. Hard-coat-anodized sideplates add resistance to marine corrosion, helping the block stand up to demanding sailing environments.\u003c\/p\u003e\u003cp\u003eWith support for line up to 1\/2 inch and a maximum working load of 1,799 pounds, this Harken triple block is suited to a range of sailboat and rigging applications. Its 60mm sheaves and compact overall design make it a practical choice for sailors, riggers, and marine professionals looking for a durable triple block with high load capacity.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eForged aluminum sideplates:\u003c\/strong\u003e Compound-curve construction provides a strong, contemporary design for marine rigging systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHard-coat-anodized finish:\u003c\/strong\u003e Helps resist corrosion in demanding marine environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComposite bearing sheave:\u003c\/strong\u003e Resists corrosion to support long service life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTriple-block configuration:\u003c\/strong\u003e Provides three sheaves for compatible line-handling and sailboat rigging applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh load capacity:\u003c\/strong\u003e Supports a maximum working load of 1,799 pounds and a breaking load of 3,598 pounds.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eProduct Details:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Harken\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e 6275\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSheave diameter:\u003c\/strong\u003e 2-3\/8 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall length:\u003c\/strong\u003e 6-1\/2 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 24.9 ounces\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShackle pin:\u003c\/strong\u003e 5\/16 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum line size:\u003c\/strong\u003e 1\/2 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum working load:\u003c\/strong\u003e 1,799 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBreaking load:\u003c\/strong\u003e 3,598 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Triple block\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eChoose the Harken 60mm Element Triple Block, Part 6275, for durable, corrosion-resistant performance in compatible sailing and marine rigging systems.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSEO Meta Description:\u003c\/strong\u003e Harken 60mm Element Triple Block with corrosion-resistant construction, 1\/2-inch line capacity, and a 1,799-pound maximum working load.\u003c\/p\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\n\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cbr\u003e","brand":"Harken","offers":[{"title":"Default Title","offer_id":44937012084825,"sku":"93771","price":255.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/93771XL.jpg?v=1789835624"},{"product_id":"harken-57mm-carbo-block-flip-flop-with-cam-part-2143","title":"Harken 57mm Carbo Block Flip Flop with Cam, Part 2143","description":"\u003cp\u003e\u003cstrong\u003e57mm Carbo Block Flip Flop with Cam\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eSmall Boat Flip-Flop blocks pivot around the line axis to keep the line close to the deck. Hinged construction allows for various lead angles.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSheave  (mm) 57 mm\u003c\/li\u003e\n\u003cli\u003eSheave  (in) 2 1\/4 in\u003c\/li\u003e\n\u003cli\u003eMaximum line  (mm) 10 mm\u003c\/li\u003e\n\u003cli\u003eMaximum line  (in) 3\/8 in\u003c\/li\u003e\n\u003cli\u003eMaximum working load (kg) 136 kg\u003c\/li\u003e\n\u003cli\u003eMaximum working load (lb) 300 lb\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\n\u003cp\u003eThe Harken 57mm Carbo Block Flip Flop with Cam is a compact small-boat sailing block designed to keep line close to the deck while accommodating changing lead angles. Its pivoting flip-flop design rotates around the line axis, while the hinged construction helps guide line at various angles for practical trimming and control applications.\u003c\/p\u003e\u003cp\u003ePart 2143 combines a 57mm sheave with a cam for managing lines up to 3\/8 inch. With a maximum working load of 300 pounds, this Harken Carbo block is suited for small-boat sailing systems where dependable line handling and flexible positioning are important.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePivoting flip-flop design:\u003c\/strong\u003e Rotates around the line axis to help keep the line close to the deck.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHinged construction:\u003c\/strong\u003e Accommodates various lead angles for flexible line routing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated cam:\u003c\/strong\u003e Provides a convenient way to manage compatible sailing lines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e57mm sheave:\u003c\/strong\u003e Supports lines up to 3\/8 inch in diameter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e300-pound maximum working load:\u003c\/strong\u003e Provides a clearly specified load rating for appropriate small-boat applications.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eProduct Details:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Harken\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e 2143\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct type:\u003c\/strong\u003e Carbo block flip flop with cam\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSheave diameter:\u003c\/strong\u003e 2 1\/4 inches (57mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum line size:\u003c\/strong\u003e 3\/8 inch (10mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum working load:\u003c\/strong\u003e 300 pounds (136kg)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct dimensions:\u003c\/strong\u003e 5 inches long by 5 inches wide by 3 inches high\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.26 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntended use:\u003c\/strong\u003e Small-boat sailing line control and routing\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eChoose the Harken 57mm Carbo Block Flip Flop with Cam when your small-boat system requires pivoting line guidance, flexible lead angles, and a defined working-load rating.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSEO Meta Description:\u003c\/strong\u003e Shop the Harken 57mm Carbo Block Flip Flop with Cam, Part 2143, for small-boat line control with flexible lead angles and a 300 lb load rating.\u003c\/p\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\n\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cbr\u003e","brand":"Harken","offers":[{"title":"Default Title","offer_id":44937029091417,"sku":"92859","price":320.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/92859XL.jpg?v=1789836259"},{"product_id":"harken-40mm-carbo-air-twing-block-2699-for-dinghies-and-sport-boats","title":"Harken 40mm Carbo Air Twing Block 2699 for Dinghies and Sport Boats","description":"\u003cp\u003e\u003cstrong\u003e40mm Twing Block\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eLow-friction Carbo Air blocks are lightweight, strong, reliableand affordable. Companions to our popular Harken Big Boat blocks, these small, compact blocks have very high working loads for safe, easy trimming.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eOpening side plate - Easy to rig and remove from sheet\u003c\/li\u003e\n\u003cli\u003eSpring biased to open when unlatched - One-handed operation\u003c\/li\u003e\n\u003cli\u003eRoller at pivot base - Use 1:1 or 2:1 up-down control\u003c\/li\u003e\n\u003cli\u003eCarbo Air block construction - High strength for durability and lightweight for maximum float in light air\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eUses:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eDinghies, sport boats, and small keelboats\u003c\/li\u003e\n\u003cli\u003eSpinnaker sheet and guy control\u003c\/li\u003e\n\u003cli\u003eCode zero sheet up-down control\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSheave  (mm): 40 mm\u003c\/li\u003e\n\u003cli\u003eSheave  (in): 1-9\/16 in\u003c\/li\u003e\n\u003cli\u003eLength (mm): 89 mm\u003c\/li\u003e\n\u003cli\u003eLength (in): 3-1\/2 in\u003c\/li\u003e\n\u003cli\u003eWeight (g): 86 g\u003c\/li\u003e\n\u003cli\u003eWeight (oz): 3 oz\u003c\/li\u003e\n\u003cli\u003eMaximum line  (mm): 12 mm\u003c\/li\u003e\n\u003cli\u003eMaximum line  (in): 3\/8 in\u003c\/li\u003e\n\u003cli\u003eMaximum working load (kg): 275 kg\u003c\/li\u003e\n\u003cli\u003eMaximum working load (lb): 606 lb\u003c\/li\u003e\n\u003cli\u003eBreaking load (kg): 825 kg\u003c\/li\u003e\n\u003cli\u003eBreaking load (lb): 1818 lb\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\n\u003cp\u003e\u003cstrong\u003eHarken 40mm Twing Block 2699\u003c\/strong\u003e is a compact, lightweight line-control block designed for dinghies, sport boats, and small keelboats. Built for spinnaker sheet and guy control as well as Code zero sheet up-down control, this Harken Carbo Air block delivers dependable trimming performance with a high working load in a small package.\u003c\/p\u003e\u003cp\u003eThe opening side plate makes the block easy to rig and remove from the sheet, while the spring-biased design opens when unlatched for convenient one-handed operation. A roller at the pivot base allows the block to be used for either 1:1 or 2:1 up-down control, giving sailors flexible rigging options for different control applications. Carbo Air construction combines low friction, strength, and light weight to help reduce unnecessary weight aloft, particularly in light-air sailing conditions.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKEY FEATURES:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOpening side plate:\u003c\/strong\u003e Makes the block easy to rig and remove from the sheet.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpring-biased opening:\u003c\/strong\u003e Opens when unlatched for convenient one-handed operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePivot-base roller:\u003c\/strong\u003e Supports 1:1 or 2:1 up-down control configurations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCarbo Air construction:\u003c\/strong\u003e Provides a lightweight, high-strength design for durable sailing use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersatile sailing applications:\u003c\/strong\u003e Suitable for spinnaker sheet and guy control and Code zero sheet up-down control.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003ePRODUCT DETAILS:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Harken\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e 2699\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlock type:\u003c\/strong\u003e 40mm Twing Block\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSheave:\u003c\/strong\u003e 1-9\/16 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 3-1\/2 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 3 ounces\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum line size:\u003c\/strong\u003e 3\/8 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum working load:\u003c\/strong\u003e 606 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBreaking load:\u003c\/strong\u003e 1,818 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntended use:\u003c\/strong\u003e Dinghies, sport boats, small keelboats, spinnaker sheet and guy control, and Code zero sheet up-down control\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eChoose the Harken 40mm Twing Block 2699 for compact, flexible, and reliable line control on smaller sailboats.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSEO META DESCRIPTION:\u003c\/strong\u003e\u003cbr\u003eHarken 40mm Twing Block 2699 offers lightweight, high-strength line control for spinnaker sheets, guys, and Code zero systems on smaller sailboats.\u003c\/p\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\n\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOwners Manual Url: https:\/\/productimageserver.com\/literature\/ownersManual\/103566OM.pdf\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cbr\u003e","brand":"Harken","offers":[{"title":"Default Title","offer_id":44937045540953,"sku":"103566","price":94.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/103566XL.jpg?v=1789836782"},{"product_id":"harken-40mm-double-sheave-fishing-block-part-number-2184","title":"Harken 40mm Double Sheave Fishing Block, Part Number 2184","description":"\u003cp\u003e\u003cstrong\u003e40mm Double Sheave Fishing Block\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eLow-friction Carbo Air blocks are lightweight, strong, and reliable. These compact blocks have very high working loads and smooth operation to simplify the positioning and retrieval of teaser lines. \u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSheave  (mm): 40 mm\u003c\/li\u003e\n\u003cli\u003eSheave  (in): 1-9\/16 in\u003c\/li\u003e\n\u003cli\u003eMaximum line  (mm): 10 mm\u003c\/li\u003e\n\u003cli\u003eMaximum line  (in): 3\/8 in\u003c\/li\u003e\n\u003cli\u003eMaximum working load (kg): 220 kg\u003c\/li\u003e\n\u003cli\u003eMaximum working load (lb): 485 lbs\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\n\u003cp\u003eThe Harken 40mm Double Sheave Fishing Block is a compact, low-friction block designed to help simplify the positioning and retrieval of teaser lines. Built for marine applications that require smooth operation, high working capacity, and dependable handling, this double sheave fishing block is a practical choice for anglers and boat owners working with lines up to 3\/8 inch.\u003c\/p\u003e\u003cp\u003ePart of Harken's Carbo Air block range, the 2184 fishing block combines lightweight construction with strength and reliable performance. Its two 40mm sheaves help reduce friction during line movement, making it easier to manage teaser lines during setup, adjustment, and retrieval. With a maximum working load of 485 pounds, it is suited to demanding onboard line-handling tasks within its rated specifications.\u003c\/p\u003e\u003cp\u003eUse the Harken 40mm Double Sheave Fishing Block for teaser line systems and other compatible marine rigging applications where a compact double sheave configuration is required. Always select and operate the block according to the stated line-size and working-load limits.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDouble sheave design:\u003c\/strong\u003e Supports smooth handling of teaser lines and other compatible marine rigging applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow-friction operation:\u003c\/strong\u003e Helps simplify positioning and retrieval by allowing the line to move smoothly through the block.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact Carbo Air construction:\u003c\/strong\u003e Provides a lightweight, space-conscious solution for onboard line handling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh working load:\u003c\/strong\u003e Rated for a maximum working load of 485 pounds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible line size:\u003c\/strong\u003e Designed for lines up to 3\/8 inch in diameter.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eProduct Details:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Harken\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e 2184\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct type:\u003c\/strong\u003e Double sheave fishing block\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSheave size:\u003c\/strong\u003e 1-9\/16 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum line size:\u003c\/strong\u003e 3\/8 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum working load:\u003c\/strong\u003e 485 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct dimensions:\u003c\/strong\u003e 3 inches long by 3 inches wide by 1 inch high\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eChoose the Harken 40mm Double Sheave Fishing Block for compact, smooth, and reliable teaser line handling backed by clearly defined operating specifications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSEO Meta Description:\u003c\/strong\u003e\u003cbr\u003eShop the Harken 40mm Double Sheave Fishing Block for smooth teaser line handling, low-friction operation, and a 485-pound working load.\u003c\/p\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\n\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cbr\u003e","brand":"Harken","offers":[{"title":"Default Title","offer_id":44937051242585,"sku":"103225","price":72.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/103225XL.jpg?v=1789836924"},{"product_id":"harken-57mm-triple-carbo-block-with-swivel-becket-and-cam-cleat-part-2141","title":"Harken 57mm Triple Carbo Block with Swivel, Becket and Cam Cleat, Part 2141","description":"\u003cp\u003e\u003cstrong\u003e57mm Triple Carbo Block - Swivel, Becket, Cam Cleat\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eCarbo Ratchets allow sailors to hand-hold loaded lines and offer a balance between holding power and controlled easing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSheave  (mm) 57 mm\u003c\/li\u003e\n\u003cli\u003eSheave  (in) 2 1\/4 in\u003c\/li\u003e\n\u003cli\u003eMaximum line  (mm) 10 mm\u003c\/li\u003e\n\u003cli\u003eMaximum line  (in) 3\/8 in\u003c\/li\u003e\n\u003cli\u003eMaximum working load (kg) 816 kg\u003c\/li\u003e\n\u003cli\u003eMaximum working load (lb) 1800 lb\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\n\u003cp\u003e\u003cstrong\u003eHarken 57mm Triple Carbo Block - Swivel, Becket, Cam Cleat\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Harken 57mm Triple Carbo Block, Part 2141, is designed for sailors who need reliable line control with convenient swiveling, becket attachment, and integrated cam cleat functionality. Carbo Ratchets help sailors hand-hold loaded lines while balancing holding power with controlled easing, making this block a practical choice for managing loaded sailing lines in applications that use compatible line sizes.\u003c\/p\u003e\u003cp\u003eBuilt around a 57mm sheave, this triple block accommodates line up to 3\/8 inch and supports a maximum working load of 1,800 pounds. The swivel configuration helps the block align with changing line direction, while the becket provides an attachment point and the cam cleat helps secure the line during use. Together, these features provide versatile handling for sailing systems that require a compact block with multiple line-management functions.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTriple block configuration:\u003c\/strong\u003e Provides three sheaves for sailing line-routing applications requiring multiple purchase points.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSwivel design:\u003c\/strong\u003e Allows the block to align with the direction of the loaded line.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBecket attachment:\u003c\/strong\u003e Adds an integrated connection point for compatible rigging setups.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCam cleat:\u003c\/strong\u003e Helps secure compatible line during handling and adjustment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCarbo Ratchet function:\u003c\/strong\u003e Helps sailors hand-hold loaded lines while providing holding power and controlled easing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh working load:\u003c\/strong\u003e Supports a maximum working load of 1,800 pounds.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eProduct Details:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Harken\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e 2141\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct type:\u003c\/strong\u003e 57mm triple Carbo block with swivel, becket, and cam cleat\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSheave diameter:\u003c\/strong\u003e 57 mm (2 1\/4 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum line size:\u003c\/strong\u003e 10 mm (3\/8 inch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum working load:\u003c\/strong\u003e 816 kg (1,800 pounds)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eChoose the Harken 57mm Triple Carbo Block, Part 2141, for versatile line control and dependable handling in compatible sailing applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSEO Meta Description:\u003c\/strong\u003e Shop the Harken 57mm Triple Carbo Block with swivel, becket and cam cleat for controlled line handling and up to 1,800 lb working load.\u003c\/p\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\n\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cbr\u003e","brand":"Harken","offers":[{"title":"Default Title","offer_id":44937052258393,"sku":"89302","price":290.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/89302XL.jpg?v=1789836960"},{"product_id":"harken-57mm-carbo-quad-swivel-block-2631-for-sailboat-line-control","title":"Harken 57mm Carbo Quad Swivel Block 2631 for Sailboat Line Control","description":"\u003cp\u003e\u003cstrong\u003e57mm Carbo Quad Block - Swivel\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eLow-friction Carbo Air blocks are lightweight, strong, reliableand affordable. Companions to our popular Harken Big Boat blocks, these small, compact blocks have very high working loads for safe, easy trimming.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSheave  (mm) 57 mm\u003c\/li\u003e\n\u003cli\u003eSheave  (in) 2 1\/4 in\u003c\/li\u003e\n\u003cli\u003eMaximum line  (mm) 10 mm\u003c\/li\u003e\n\u003cli\u003eMaximum line  (in) 3\/8 in\u003c\/li\u003e\n\u003cli\u003eMaximum working load (kg) 1080 kg\u003c\/li\u003e\n\u003cli\u003eMaximum working load (lb) 2380 lb\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\n\u003cp\u003e\u003cstrong\u003eHarken 57mm Carbo Quad Block - Swivel, Part Number 2631\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Harken 57mm Carbo Quad Swivel Block is a lightweight, low-friction sailing block designed for reliable line handling and trimming on sailboats. Its compact Carbo Air construction combines strength with a high maximum working load, making it suitable for sailors who need smooth, controlled adjustment in a space-conscious setup. As a companion to Harken Big Boat blocks, this quad block provides practical performance for a range of onboard trimming applications.\u003c\/p\u003e\u003cp\u003eWith four sheaves and a swivel configuration, the Harken Carbo Quad Block helps organize and redirect sailing lines while allowing the block to align with changing line angles. The low-friction design supports easier trimming, and the compact format makes it useful for equipment layouts where efficient line control matters. It accommodates line up to 3\/8 inch and has a maximum working load of 2,380 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow-friction Carbo Air design:\u003c\/strong\u003e Supports smooth, easy line trimming for sailing applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuad sheave configuration:\u003c\/strong\u003e Provides four sheaves for versatile line routing and control.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSwivel block design:\u003c\/strong\u003e Allows the block to orient with the line direction during use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLightweight and compact construction:\u003c\/strong\u003e Helps provide practical performance where onboard space and equipment weight matter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh working load:\u003c\/strong\u003e Handles a maximum working load of 2,380 pounds for demanding trimming applications.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eProduct Details:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Harken\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e 2631\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct type:\u003c\/strong\u003e 57mm Carbo Quad Block - Swivel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSheave diameter:\u003c\/strong\u003e 2 1\/4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum line size:\u003c\/strong\u003e 3\/8 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum working load:\u003c\/strong\u003e 2,380 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSheave quantity:\u003c\/strong\u003e Four\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eChoose the Harken 57mm Carbo Quad Swivel Block 2631 for compact, reliable, and smooth line control on your sailboat.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSEO Meta Description:\u003c\/strong\u003e Shop the Harken 57mm Carbo Quad Swivel Block 2631 for low-friction sailboat line control, four sheaves, and a 2,380-pound working load.\u003c\/p\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\n\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cbr\u003e","brand":"Harken","offers":[{"title":"Default Title","offer_id":44937053503577,"sku":"88766","price":213.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/88766XL.jpg?v=1789836988"},{"product_id":"harken-hsb380-57mm-quad-swivel-block-with-center-becket","title":"Harken HSB380 57mm Quad Swivel Block with Center Becket","description":"\u003cp\u003e\u003cstrong\u003e57mm Quad Block Swivel, Center Becket\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eLow-friction Carbo Air blocks are lightweight, strong, reliableand affordable. Companions to our popular Harken Big Boat blocks, these small, compact blocks have very high working loads for safe, easy trimming. \u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSheave  (mm) 57 mm\u003c\/li\u003e\n\u003cli\u003eSheave  (in) 2 1\/4 in\u003c\/li\u003e\n\u003cli\u003eMaximum line  (mm) 10 mm\u003c\/li\u003e\n\u003cli\u003eMaximum line  (in) 7\/16 in\u003c\/li\u003e\n\u003cli\u003eMaximum working load (kg) 1080 kg\u003c\/li\u003e\n\u003cli\u003eMaximum working load (lb) 2380 lb\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\n\u003cp\u003e\u003cstrong\u003eHarken HSB380 57mm Quad Swivel Block with Center Becket\u003c\/strong\u003e is a lightweight, low-friction marine pulley designed for reliable line handling and efficient trimming. Built for sailors who need compact deck hardware with a high working load, this four-sheave block is well suited to sailboat control systems and other applications requiring smooth, dependable purchase.\u003c\/p\u003e\u003cp\u003ePart of the Harken Carbo Air block family, the HSB380 combines a compact design with the strength needed for demanding trimming applications. Its swivel configuration helps the block align with changing line direction, while the center becket provides a convenient attachment point for creating or configuring multi-part purchase systems. The low-friction sheaves support easier line movement, helping make adjustments more manageable during sailing operations.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuad sheave design:\u003c\/strong\u003e Four sheaves support multi-part purchase systems and efficient line handling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSwivel configuration:\u003c\/strong\u003e Allows the block to align with changing line direction for smoother operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCenter becket:\u003c\/strong\u003e Provides an integrated attachment point for purchase and trimming setups.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow-friction Carbo Air construction:\u003c\/strong\u003e Supports smooth line movement in a lightweight, compact block design.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh working load:\u003c\/strong\u003e Handles a maximum working load of 2,380 pounds for demanding trimming applications.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eProduct Details:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Harken\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e HSB380\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlock type:\u003c\/strong\u003e Quad swivel block with center becket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSheave diameter:\u003c\/strong\u003e 2 1\/4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum line size:\u003c\/strong\u003e 7\/16 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum working load:\u003c\/strong\u003e 2,380 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eChoose the Harken HSB380 when your sailboat trimming system calls for a compact quad block with swivel alignment, a center becket, and reliable low-friction performance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSEO Meta Description:\u003c\/strong\u003e Shop the Harken HSB380 57mm quad swivel block with center becket, low-friction sheaves, and a 2,380-pound maximum working load.\u003c\/p\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\n\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cbr\u003e","brand":"Harken","offers":[{"title":"Default Title","offer_id":44937053732953,"sku":"88765","price":208.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/88765XL.jpg?v=1789836999"},{"product_id":"harken-1542-midrange-single-block-with-aluminum-sheave-3-inch-sheave","title":"Harken 1542 Midrange Single Block with Aluminum Sheave, 3-Inch Sheave","description":"\u003cp\u003e\u003cstrong\u003eMidrange Single with Aluminum Sheave Block\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eMidrange blocks robust construction makes them ideal to handle the high loads found on medium and large offshore boats. Sheave runs exclusively on a ball bearing system for fast trim and release under any load.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSheave: 76mm\/3\"\u003c\/li\u003e\n\u003cli\u003eMaximum Line: 14mm\/9\/16\"\u003c\/li\u003e\n\u003cli\u003eMax Working Load: 1270kg\/2800lbs\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\n\u003cp\u003e\u003cstrong\u003eHarken 1542 Midrange Single Block with Aluminum Sheave\u003c\/strong\u003e is built for sailors who need dependable line handling on medium and large offshore boats. Its robust construction is designed to manage high loads, while the aluminum sheave runs exclusively on a ball bearing system to support fast trimming and quick release under load.\u003c\/p\u003e\u003cp\u003eDesigned for demanding marine applications, this single block accommodates line up to 9\/16 inch and supports a maximum working load of 2,800 pounds. The ball bearing sheave system helps provide smooth, responsive operation during trimming and line release, making the Harken Midrange Single a practical choice for offshore sailing systems where reliable load handling matters.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature: Aluminum sheave\u003c\/strong\u003e — Provides the durable sheave construction specified for this Harken midrange single block.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature: Ball bearing system\u003c\/strong\u003e — Supports fast trim and release under load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature: High-load construction\u003c\/strong\u003e — Built to handle the high loads found on medium and large offshore boats.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature: 3-inch sheave\u003c\/strong\u003e — Sized for the listed line-handling configuration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature: 2,800-pound maximum working load\u003c\/strong\u003e — Clearly rated for demanding marine line applications.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eProduct Details:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Harken\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 1542\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlock Type:\u003c\/strong\u003e Midrange single block\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSheave Material:\u003c\/strong\u003e Aluminum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSheave Size:\u003c\/strong\u003e 3 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Line Size:\u003c\/strong\u003e 9\/16 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Working Load:\u003c\/strong\u003e 2,800 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntended Use:\u003c\/strong\u003e Medium and large offshore boats\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eChoose the Harken 1542 Midrange Single Block with Aluminum Sheave for robust, high-load performance in offshore sailing applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSEO Meta Description:\u003c\/strong\u003e Harken 1542 midrange single block with aluminum sheave, ball bearings, 3-inch sheave, and 2,800-pound working load for offshore boats.\u003c\/p\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\n\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cbr\u003e","brand":"Harken","offers":[{"title":"Default Title","offer_id":44937064808537,"sku":"86871","price":196.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/86871XL.jpg?v=1789837289"},{"product_id":"harken-1540-midrange-single-block-with-3-inch-sheave-for-offshore-boats","title":"Harken 1540 Midrange Single Block with 3-Inch Sheave for Offshore Boats","description":"\u003cp\u003e\u003cstrong\u003eMidrange Single Block\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eMidrange blocks robust construction makes them ideal to handle the high loads found on medium and large offshore boats. Sheave runs exclusively on a ball bearing system for fast trim and release under any load. \u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSheave: 76mm\/3\"\u003c\/li\u003e\n\u003cli\u003eMaximum Line: 14mm\/9\/16\"\u003c\/li\u003e\n\u003cli\u003eMax Working Load: 1270kg\/2800lbs\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\n\u003cp\u003e\u003cstrong\u003eHarken 1540 Midrange Single Block\u003c\/strong\u003e is built for sailors who need dependable control-line handling on medium and large offshore boats. Its robust construction is designed to manage the high loads associated with offshore sailing, while the ball-bearing sheave system supports fast trim and release under load. Use this single block in sailing control systems where smooth operation and substantial working-load capacity are important.\u003c\/p\u003e\u003cp\u003eThe Harken Midrange Single Block combines practical offshore functionality with a compact design suited to a range of rigging applications. The 3-inch sheave accommodates line up to 9\/16 inch, making it a useful choice for larger control lines. Its sheave runs exclusively on a ball-bearing system to help deliver responsive trimming and easing performance, including during demanding sailing maneuvers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRobust midrange construction:\u003c\/strong\u003e Designed to handle the high loads found on medium and large offshore boats.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBall-bearing sheave system:\u003c\/strong\u003e Supports fast trim and release under load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3-inch sheave:\u003c\/strong\u003e Sized for practical use in larger sailing control systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e9\/16-inch maximum line capacity:\u003c\/strong\u003e Accommodates line up to 14 mm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2,800-pound maximum working load:\u003c\/strong\u003e Provides substantial load capacity for appropriate offshore rigging applications.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eProduct Details:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Harken\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e 1540\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct type:\u003c\/strong\u003e Midrange single block\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSheave size:\u003c\/strong\u003e 3 inches (76 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum line size:\u003c\/strong\u003e 9\/16 inch (14 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum working load:\u003c\/strong\u003e 2,800 pounds (1,270 kg)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e One single block\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eChoose the Harken 1540 Midrange Single Block for robust, ball-bearing-supported performance in demanding offshore sailing and rigging applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSEO Meta Description:\u003c\/strong\u003e Harken 1540 midrange single block with a 3-inch ball-bearing sheave, 9\/16-inch line capacity, and 2,800-pound working load for offshore boats.\u003c\/p\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\n\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cbr\u003e","brand":"Harken","offers":[{"title":"Default Title","offer_id":44937064939609,"sku":"86870","price":151.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/86870XL.jpg?v=1789837301"},{"product_id":"harken-1544-midrange-double-block-with-3-inch-ball-bearing-sheaves","title":"Harken 1544 Midrange Double Block with 3-Inch Ball-Bearing Sheaves","description":"\u003cp\u003e\u003cstrong\u003eMidrange Double Block\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eMidrange blocks robust construction makes them ideal to handle the high loads found on medium and large offshore boats. Sheave runs exclusively on a ball bearing system for fast trim and release under any load.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSheave: 76mm\/3\"\u003c\/li\u003e\n\u003cli\u003eMaximum Line: 14mm\/9\/16\"\u003c\/li\u003e\n\u003cli\u003eMax Working Load: 1270kg\/2800lbs\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\n\u003cp\u003e\u003cstrong\u003eHarken 1544 Midrange Double Block\u003c\/strong\u003e is built for medium and large offshore boats that require dependable handling of high line loads. Its robust construction and ball-bearing sheave system support fast trimming and controlled release under load, making it a practical choice for demanding marine rigging applications.\u003c\/p\u003e\u003cp\u003eDesigned for use with line up to 9\/16 inch, this double block features two 3-inch sheaves that run exclusively on ball bearings. The ball-bearing system helps the sheaves rotate smoothly during trim and release operations, while the midrange design provides a strong, purpose-built solution for offshore sailing and other high-load applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRobust midrange construction:\u003c\/strong\u003e Designed to handle the high loads associated with medium and large offshore boats.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBall-bearing sheave system:\u003c\/strong\u003e Supports fast trimming and release under load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDouble-block configuration:\u003c\/strong\u003e Provides two sheaves for marine line-handling systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3-inch sheaves:\u003c\/strong\u003e Built for use with line up to 9\/16 inch.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh working-load capacity:\u003c\/strong\u003e Rated for a maximum working load of 2,800 pounds.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eProduct Details:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Harken\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 1544\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Midrange double block\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSheave Size:\u003c\/strong\u003e 3 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Line Size:\u003c\/strong\u003e 9\/16 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Working Load:\u003c\/strong\u003e 2,800 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntended Use:\u003c\/strong\u003e Medium and large offshore boats\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eChoose the Harken 1544 Midrange Double Block when your offshore rigging system calls for robust construction, smooth ball-bearing operation, and reliable handling of high working loads.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSEO Meta Description:\u003c\/strong\u003e Harken 1544 Midrange Double Block with 3-inch ball-bearing sheaves, 2,800-pound working load, and 9\/16-inch line capacity.\u003c\/p\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\n\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cbr\u003e","brand":"Harken","offers":[{"title":"Default Title","offer_id":44937065201753,"sku":"86868","price":280.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/86868XL.jpg?v=1789837310"},{"product_id":"harken-80mm-element-stand-up-block-6280","title":"Harken 80mm Element Stand-Up Block, 6280","description":"\u003cp\u003e\u003cstrong\u003e80mm Element Stand Up Block\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eStand-up blocks are an addition to our Element line. Use them for sheeting and halyard systems, running backstays, controls and other applications where you dont want the block to hit the deck.\u003cbr\u003e\u003cbr\u003eElement blocks introduce sideplates that combine forged aluminum and compound curves for strength. They are simultaneously contemporary and very robust. Elements design pairs the minimum amount of metal required to protect the sheave with a proven journal bearing. So size for size, Element is priced significantly lower, than our previously least expensive blocks.\u003cbr\u003e\u003cbr\u003eSideplates are hardcoat-anodized to resist corrosion. A tough composite bearing sheave resists corrosion for a long service life. \u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSheave: 80mm (3-1\/8\")\u003c\/li\u003e\n\u003cli\u003eMax Line: 16mm (5\/8\")\u003c\/li\u003e\n\u003cli\u003eMax Working Load: 2200kg (4850lbs)\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\n\u003cp\u003e\u003cstrong\u003eHarken 80mm Element Stand-Up Block\u003c\/strong\u003e is designed for sailboat sheeting, halyard systems, running backstays, control lines, and other applications where a block should remain elevated above the deck. Part number 6280 combines corrosion-resistant construction with a proven journal bearing to deliver dependable line handling in a compact marine block.\u003c\/p\u003e\u003cp\u003eThe Element design uses sideplates that combine forged aluminum with compound curves for strength and protection around the sheave. Its streamlined construction uses only the metal needed to shield the sheave, helping provide a practical alternative for sailors and riggers seeking reliable performance and value. The stand-up configuration helps keep the block positioned away from the deck for suitable onboard line-management applications.\u003c\/p\u003e\u003cp\u003eHardcoat-anodized sideplates help resist corrosion in the marine environment, while the tough composite bearing sheave is designed to resist corrosion for long service life. With support for line up to 5\/8 inch and a maximum working load of 4,850 pounds, this Harken Element block is suited to a range of sailboat control and rigging systems.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKEY FEATURES:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStand-up configuration:\u003c\/strong\u003e Keeps the block elevated above the deck for sheeting, halyards, running backstays, controls, and related rigging applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eForged aluminum sideplates:\u003c\/strong\u003e Compound-curve construction provides strength while protecting the sheave.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorrosion-resistant design:\u003c\/strong\u003e Hardcoat-anodized sideplates and a tough composite bearing sheave support long service life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eJournal bearing:\u003c\/strong\u003e Proven bearing design supports dependable line handling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh working load:\u003c\/strong\u003e Supports a maximum working load of 4,850 pounds.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003ePRODUCT DETAILS:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Harken\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e 6280\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct type:\u003c\/strong\u003e 80mm Element stand-up block\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSheave diameter:\u003c\/strong\u003e 3-1\/8 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum line size:\u003c\/strong\u003e 5\/8 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum working load:\u003c\/strong\u003e 4,850 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSheave material:\u003c\/strong\u003e Composite\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSideplate material:\u003c\/strong\u003e Forged aluminum with hardcoat anodized finish\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eChoose the Harken 80mm Element Stand-Up Block for a durable, corrosion-resistant solution for elevated sailboat sheeting, halyard, backstay, and control-line systems.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSEO META DESCRIPTION:\u003c\/strong\u003e\u003cbr\u003eShop the Harken 80mm Element Stand-Up Block, part 6280, with corrosion-resistant construction and a 4,850-pound working load.\u003c\/p\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\n\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cbr\u003e","brand":"Harken","offers":[{"title":"Default Title","offer_id":44937070542937,"sku":"86596","price":336.35,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/86596XL.jpg?v=1789837484"},{"product_id":"harken-6221-80mm-single-element-block-mastbase-with-swivel","title":"Harken 6221 80mm Single Element Block Mastbase with Swivel","description":"\u003cp\u003e\u003cstrong\u003e80mm Single Element Block Mastbase with Swivel\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eElement blocks introduce sideplates that combine forged aluminum and compound curves for strength. They are simultaneously contemporary and very robust. Elements design pairs the minimum amount of metal required to protect the sheave with a proven journal bearing. So size for size, Element is priced significantly lower, than our previously least expensive blocks.\u003cbr\u003e\u003cbr\u003eSideplates are hardcoat-anodized to resist corrosion. A tough composite bearing sheave resists corrosion for a long service life. \u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSheave: 80mm (3-1\/8\")\u003c\/li\u003e\n\u003cli\u003eMax Line: 16mm (5\/8\")\u003c\/li\u003e\n\u003cli\u003eMax Working Load: 2200kg (4850lbs)\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\n\u003cp\u003eThe Harken 6221 80mm Single Element Block Mastbase with Swivel is designed for sailing applications that require dependable line handling, corrosion resistance, and a robust, streamlined block design. Its swivel mastbase configuration helps support flexible line direction, while the Element construction delivers practical performance with less metal surrounding the sheave.\u003c\/p\u003e\u003cp\u003eEngineered with forged aluminum sideplates and compound curves, the Harken Element block combines structural strength with a contemporary profile. The sideplates are hardcoat-anodized to resist corrosion, making this sailing block suitable for marine environments. A tough composite bearing sheave also resists corrosion and supports long service life. The proven journal bearing provides reliable operation for compatible sailboat rigging systems.\u003c\/p\u003e\u003cp\u003eThe 80mm sheave accommodates line up to 16mm, or 5\/8 inch, and supports a maximum working load of 4,850 pounds. Use the Harken 6221 as a mastbase block for sailboat control lines and other marine rigging applications that require a single-element block with a swivel. Its combination of forged aluminum construction, corrosion-resistant components, and compact design makes it a practical choice for sailors, riggers, and boat owners maintaining or upgrading their deck hardware.\u003c\/p\u003e\u003ch3\u003eKey Features:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle-element mastbase block:\u003c\/strong\u003e Provides a compact solution for sailboat line handling and deck hardware applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSwivel configuration:\u003c\/strong\u003e Allows the block to support flexible line direction during operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eForged aluminum sideplates:\u003c\/strong\u003e Combine strength with a streamlined Element design.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorrosion-resistant construction:\u003c\/strong\u003e Hardcoat-anodized sideplates and a composite bearing sheave help withstand marine conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProven journal bearing:\u003c\/strong\u003e Supports dependable block operation for compatible rigging systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh working-load capacity:\u003c\/strong\u003e Supports a maximum working load of 4,850 pounds.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eProduct Details:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Harken\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 6221\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Single-element block mastbase with swivel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSheave Diameter:\u003c\/strong\u003e 80mm (3-1\/8 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Line Size:\u003c\/strong\u003e 16mm (5\/8 inch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Working Load:\u003c\/strong\u003e 2,200kg (4,850 pounds)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSideplate Material:\u003c\/strong\u003e Forged aluminum with hardcoat anodized finish\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBearing Sheave:\u003c\/strong\u003e Composite\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eChoose the Harken 6221 Element mastbase block when your sailing or marine rigging setup calls for a corrosion-resistant 80mm block with a swivel and substantial working-load capacity.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSEO Meta Description:\u003c\/strong\u003e Shop the Harken 6221 80mm single-element mastbase block with swivel, corrosion-resistant construction, and a 4,850-pound maximum working load.\u003c\/p\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\n\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cbr\u003e","brand":"Harken","offers":[{"title":"Default Title","offer_id":44937070706777,"sku":"86595","price":122.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/86595XL.jpg?v=1789837492"},{"product_id":"harken-6220-60mm-single-element-block-mastbase-with-swivel","title":"Harken 6220 60mm Single Element Block Mastbase with Swivel","description":"\u003cp\u003e\u003cstrong\u003e60mm Single Element Block Mastbase with Swivel\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eElement blocks introduce sideplates that combine forged aluminum and compound curves for strength. They are simultaneously contemporary and very robust. Elements design pairs the minimum amount of metal required to protect the sheave with a proven journal bearing. So size for size, Element is priced significantly lower, than our previously least expensive blocks.\u003cbr\u003e\u003cbr\u003eSideplates are hardcoat-anodized to resist corrosion. A tough composite bearing sheave resists corrosion for a long service life.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSheave: 60mm (2-3\/8\"\u003c\/li\u003e\n\u003cli\u003eMax Line: 14mm (9\/16\")\u003c\/li\u003e\n\u003cli\u003eMax Working Load: 1100kg (2425lbs)\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\n\u003cp\u003eThe Harken 6220 60mm Single Element Block Mastbase with Swivel is designed for sailors and rigging professionals who need a compact, corrosion-resistant block for mastbase applications. Its single-element design combines forged aluminum sideplates, compound curves, and a proven journal bearing to provide dependable line handling while using only the metal needed to protect the sheave.\u003c\/p\u003e\u003cp\u003eThe Harken Element block features hardcoat-anodized sideplates that help resist corrosion in demanding marine environments. Its tough composite bearing sheave is also corrosion resistant, supporting long service life in sailing and other rigging applications. The swivel configuration allows the block to align with changing line direction, making it suitable for mastbase routing where smooth, controlled line handling is required.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eForged aluminum sideplates:\u003c\/strong\u003e Provide a strong, robust structure while maintaining the streamlined Element design.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardcoat-anodized finish:\u003c\/strong\u003e Helps resist corrosion for reliable use in marine environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComposite bearing sheave:\u003c\/strong\u003e Resists corrosion and supports long service life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSwivel mastbase design:\u003c\/strong\u003e Helps the block align with changing line direction during rigging operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle-element construction:\u003c\/strong\u003e Uses a practical amount of metal to protect the sheave while offering a cost-conscious alternative within the Harken block range.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eProduct Details:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Harken\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e 6220\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct type:\u003c\/strong\u003e Single Element Block Mastbase with Swivel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSheave diameter:\u003c\/strong\u003e 2-3\/8 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum line size:\u003c\/strong\u003e 9\/16 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum working load:\u003c\/strong\u003e 2,425 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e Forged aluminum sideplates with a composite bearing sheave\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eChoose the Harken 6220 60mm Single Element Block Mastbase with Swivel for durable, corrosion-resistant line handling in mastbase rigging applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSEO Meta Description:\u003c\/strong\u003e\u003cbr\u003eHarken 6220 60mm Single Element Block Mastbase with Swivel features corrosion-resistant construction and a 2,425-pound maximum working load.\u003c\/p\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\n\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cbr\u003e","brand":"Harken","offers":[{"title":"Default Title","offer_id":44937071001689,"sku":"86594","price":76.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/86594XL.jpg?v=1789837501"},{"product_id":"seasure-telescopic-cruiser-tiller-extension-part-number-23-72","title":"SeaSure Telescopic Cruiser Tiller Extension, Part Number 23.72","description":"\u003cp\u003e\u003cstrong\u003eTelescopic Cruiser Extension\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe tiller extension is simple to adjust; simply twist the handle 90 degrees, and it slides open or closed. Once you have it to the length that is required, twist it back 90 degrees to lock it.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eThis telescopic cruiser tiller extension has a closed length of 71cm and an open length of 102cm\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eWeight: 0.2kg\u003c\/li\u003e\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\n\u003cp\u003e\u003cstrong\u003eSeaSure Telescopic Cruiser Tiller Extension\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eAdjust steering reach quickly and conveniently with the SeaSure Telescopic Cruiser Tiller Extension, part number 23.72. Designed for boating applications, this adjustable tiller extension slides open or closed with a simple twist-lock handle, helping you set the length needed for comfortable and responsive tiller control.\u003c\/p\u003e\u003cp\u003eThe extension is easy to adjust while underway or during setup. Twist the handle 90 degrees to release the telescoping mechanism, slide the extension to the desired length, then twist the handle back 90 degrees to lock it securely in position. Its lightweight construction adds minimal weight while providing a practical way to extend tiller reach.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTelescoping adjustment:\u003c\/strong\u003e Slides open or closed to provide flexible tiller reach.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwist-lock handle:\u003c\/strong\u003e Rotate the handle 90 degrees to release and lock the extension.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable length:\u003c\/strong\u003e Extends from approximately 28 inches closed to approximately 40 inches open.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLightweight design:\u003c\/strong\u003e Weighs approximately 0.44 pounds for convenient handling.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eProduct Details:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e SeaSure\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct type:\u003c\/strong\u003e Telescopic cruiser tiller extension\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e 23.72\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClosed length:\u003c\/strong\u003e 71 centimeters, approximately 28 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOpen length:\u003c\/strong\u003e 102 centimeters, approximately 40 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.2 kilograms, approximately 0.44 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eChoose the SeaSure Telescopic Cruiser Tiller Extension for a straightforward, adjustable solution to extending tiller reach on your boat.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSEO Meta Description:\u003c\/strong\u003e Adjust tiller reach with the SeaSure Telescopic Cruiser Extension, featuring twist-lock adjustment and a range from 28 to 40 inches.\u003c\/p\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\n\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cbr\u003e","brand":"SeaSure","offers":[{"title":"Default Title","offer_id":44937087385689,"sku":"100455","price":121.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/100455XL.jpg?v=1789837916"},{"product_id":"seasure-hatch-lock-23-35-for-sliding-washboards-up-to-3-4-inch","title":"SeaSure Hatch Lock 23.35 for Sliding Washboards up to 3\/4 Inch","description":"\u003cp\u003e\u003cstrong\u003eHatch Lock\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eUsed to secure the sliding hatch to the washboards, this hatch lock can be operated from the cabin or the cockpit. Provision for a padlock.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSuitable for washboards up to 19mm thick\u003c\/li\u003e\n\u003cli\u003eThe Only RORC-certified hatch lock\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eWeight: 0.2kg\u003c\/li\u003e\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\n\u003cp\u003eThe SeaSure Hatch Lock 23.35 secures a sliding hatch to the washboards while allowing operation from either the cabin or cockpit. Designed for marine applications, it provides a practical way to help secure companionway-style hatch boards and includes provision for a padlock.\u003c\/p\u003e\u003cp\u003eSuitable for washboards up to 3\/4 inch thick, this SeaSure hatch lock is intended for boat owners and marine professionals who need a compact locking solution for sliding hatch systems. Its cabin- or cockpit-operated design supports convenient access from either side of the hatch area, while the padlock provision allows the user to add a compatible padlock when desired.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCabin or cockpit operation:\u003c\/strong\u003e Operate the hatch lock from inside the cabin or from the cockpit for added convenience.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSliding hatch security:\u003c\/strong\u003e Designed to secure a sliding hatch to the washboards in marine applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWashboard compatibility:\u003c\/strong\u003e Suitable for washboards up to 3\/4 inch thick.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePadlock provision:\u003c\/strong\u003e Includes provision for adding a padlock.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRORC certified:\u003c\/strong\u003e Identified as the only RORC-certified hatch lock.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eProduct Details\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e SeaSure\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct type:\u003c\/strong\u003e Hatch lock\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e 23.35\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntended use:\u003c\/strong\u003e Securing sliding hatches to washboards\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum washboard thickness:\u003c\/strong\u003e 3\/4 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e Approximately 0.44 pound\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eChoose the SeaSure Hatch Lock 23.35 for a purpose-built marine locking solution for sliding hatch and washboard applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSEO Meta Description:\u003c\/strong\u003e Secure a sliding boat hatch with the SeaSure Hatch Lock 23.35, designed for washboards up to 3\/4 inch thick with cabin or cockpit operation.\u003c\/p\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\n\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cbr\u003e","brand":"SeaSure","offers":[{"title":"Default Title","offer_id":44937087582297,"sku":"100454","price":177.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/100454XL.jpg?v=1789837920"},{"product_id":"seasure-25-05crd-stainless-steel-clip-for-1-inch-stanchion","title":"SeaSure 25.05CRD Stainless Steel Clip for 1-Inch Stanchion","description":"\u003cp\u003e\u003cstrong\u003eClip for 1\" Stanchion\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis stainless steel clip is for a 1 in. stanchion.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eWeight: 0.019kg\u003c\/li\u003e\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\n\u003cp\u003e\u003cstrong\u003eSeaSure 25.05CRD Stainless Steel Clip for 1-Inch Stanchion\u003c\/strong\u003e is a practical replacement and installation component for marine stanchion systems. Designed for use with a 1-inch stanchion, this clip provides a straightforward way to support compatible stanchion applications where a compact stainless steel fitting is required.\u003c\/p\u003e\u003cp\u003eMade from stainless steel, the SeaSure clip is suited to marine hardware use and offers a durable component for maintaining or configuring a compatible stanchion setup. Its compact design makes it easy to handle during installation, replacement, or routine maintenance. 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Manufactured from 316 stainless steel and finished through multiple machining and polishing operations, this pad eye plate features a smooth surface with damaging sharp corners and burrs removed. Its electro-polished finish provides enhanced resistance to the marine environment, making it a practical choice for boatbuilding, marine repair, and general sailing hardware applications.\u003c\/p\u003e\u003cp\u003eThe square 46mm x 46mm plate includes a 6.3mm eye diameter and a 1.5mm plate thickness. Its compact format supports installation where space is limited, while the stainless steel construction provides the material performance expected from SeaSure marine hardware. 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Fitted and removed in seconds, it provides strong attachments for deck safety lines or sheet locks.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eFits a 25mm Diameter tube\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eWeight: 0.1kg\u003c\/li\u003e\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\n\u003cp\u003e\u003cstrong\u003eSeaSure Seddon Life Line Link for 25mm Diameter Tubes\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe SeaSure Seddon Life Line Link is a movable webbing link designed to create a convenient attachment point around a boat. Fitted and removed in seconds, this compact sailing accessory helps provide strong attachment points for deck safety lines or sheet locks. It is intended for boat owners and sailors who need a flexible way to position an attachment point where it is needed.\u003c\/p\u003e\u003cp\u003eDesigned to fit 25mm diameter tubing, the SeaSure Seddon Link can be moved around the boat as needed without requiring a permanent attachment location. Its practical webbing-link design supports adaptable deck setups and makes it useful for marine applications involving safety lines and sheet locks. 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Made from nylon, each shackle is designed for quick installation: simply push it together to snap it closed. Once secured, the snap-close design is intended to remain closed without coming undone again, helping streamline setup and reduce the need for additional fastening steps.\u003c\/p\u003e\u003cp\u003eThese nylon snap close shackles are a practical choice for boat owners, marine equipment users, and DIY projects requiring a compact shackle with a straightforward closure method. The five-piece package provides multiple shackles for replacement needs, equipment projects, or keeping spares available when needed. 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The V jammer can be used to cleat the rope at any point during lifting or tension\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eMax Rope: 8mm\u003c\/li\u003e\n\u003cli\u003eBreaking Load: 1250kg\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\n\u003cp\u003e\u003cstrong\u003eSeaSure 25mm Treble Block with V-Jam\u003c\/strong\u003e is a compact, lightweight marine pulley block designed for lifting, tensioning, and purchase-system applications. Part 00.35CRD combines marine-grade stainless steel side plates and rivets with a hard-wearing arnite plastic sheave, delivering a practical solution for routing and managing rope in marine, storage, garage door, and general lifting mechanisms.\u003c\/p\u003e\u003cp\u003eAs part of SeaSure’s established 25mm plain bearing block range, this treble block is designed to support purchase systems that make lifting heavier objects more manageable by reducing the load carried by the rope. The integrated V-jammer helps secure the rope at any point during lifting or tensioning, making it useful when controlled positioning and temporary rope holding are required.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTreble block configuration:\u003c\/strong\u003e Supports purchase-system setups for lifting and tensioning applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated V-jammer:\u003c\/strong\u003e Cleats compatible rope at any point during lifting or tensioning.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMarine-grade construction:\u003c\/strong\u003e Stainless steel side plates and rivets provide the specified hardware configuration for marine and utility applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eArnite plastic sheave:\u003c\/strong\u003e Provides a lightweight, hard-wearing sheave for practical rope-routing use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e6:1 purchase capability:\u003c\/strong\u003e The 00.35 configuration can be used to create a 6:1 purchase system to aid in lifting heavier objects and decrease the load on the rope.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eProduct Details:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e SeaSure\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e 00.35CRD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct type:\u003c\/strong\u003e 25mm treble block with V-jam\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum rope size:\u003c\/strong\u003e 5\/16 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBreaking load:\u003c\/strong\u003e 2,756 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterials:\u003c\/strong\u003e Marine-grade stainless steel side plates and rivets with an arnite plastic sheave\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntended uses:\u003c\/strong\u003e Purchase systems, lifting mechanisms, garage door mechanisms, and storage solutions\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eChoose the SeaSure 00.35CRD when you need a compact 25mm treble block with an integrated V-jammer for controlled rope handling in lifting and tensioning setups.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSEO Meta Description:\u003c\/strong\u003e Shop the SeaSure 25mm treble block with V-jam, part 00.35CRD, featuring stainless steel plates, an arnite sheave, and 6:1 purchase capability.\u003c\/p\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\n\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cbr\u003e","brand":"SeaSure","offers":[{"title":"Default Title","offer_id":44937089941593,"sku":"100431","price":58.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/100431XL.jpg?v=1789837972"},{"product_id":"seasure-25mm-treble-block-with-center-becket-00-32crd","title":"SeaSure 25mm Treble Block with Center Becket 00.32CRD","description":"\u003cp\u003e\u003cstrong\u003e25mm Treble Block with Center Becket\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe 25mm plain bearing block range is one of SeaSure's oldest and best-selling ranges. The range uses marine-grade stainless steel side plates and rivets with an arnite (plastic) sheave, which is incredibly hard-wearing and light.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eThis range could be used to create purchasing systems for lifting, garage door mechanisms, storage solutions, etc.\u003c\/li\u003e\n\u003cli\u003eThe 00.32 can be used to create a 6:1 purchase system to aid in lifting heavier objects and decrease the load on the rope\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eMax Rope: 8mm\u003c\/li\u003e\n\u003cli\u003eBreaking Load: 1250kg\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\n\u003cp\u003e\u003cstrong\u003eSeaSure 25mm Treble Block with Center Becket 00.32CRD\u003c\/strong\u003e is a lightweight, hard-wearing plain bearing block designed for purchase systems and mechanical lifting applications. Its three-sheave configuration can help increase mechanical advantage, making it suitable for lifting heavier objects while reducing the load placed on the rope.\u003c\/p\u003e\u003cp\u003ePart of SeaSure’s established 25mm plain bearing block range, this treble block combines marine-grade stainless steel side plates and rivets with an arnite plastic sheave. The arnite sheave provides a durable, lightweight design for applications such as lifting systems, garage door mechanisms, storage solutions, and other rope-based setups where a compact block is required.\u003c\/p\u003e\u003ch3\u003eKey Features:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree-sheave design:\u003c\/strong\u003e Supports the creation of purchase systems, including a potential 6:1 purchase system for lifting applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCenter becket:\u003c\/strong\u003e Provides a central attachment point for configuring compatible rope systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMarine-grade stainless steel construction:\u003c\/strong\u003e Stainless steel side plates and rivets provide corrosion-resistant material suited to marine hardware applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eArnite plastic sheave:\u003c\/strong\u003e Delivers a lightweight, hard-wearing sheave for practical everyday use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e8mm rope capacity:\u003c\/strong\u003e Designed for use with rope up to 8mm.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eProduct Details:\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e SeaSure\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e 00.32CRD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct type:\u003c\/strong\u003e 25mm treble plain bearing block with center becket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum rope size:\u003c\/strong\u003e 8mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBreaking load:\u003c\/strong\u003e 1,250 kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterials:\u003c\/strong\u003e Marine-grade stainless steel side plates and rivets with an arnite plastic sheave\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntended uses:\u003c\/strong\u003e Purchase systems, lifting mechanisms, garage door mechanisms, and storage solutions\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eChoose the SeaSure 00.32CRD when you need a compact 25mm treble block with a center becket for configuring durable rope-based purchase systems.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSEO Meta Description:\u003c\/strong\u003e SeaSure 25mm treble block with center becket, marine-grade stainless steel construction, 8mm rope capacity, and 1,250kg breaking load.\u003c\/p\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\n\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cbr\u003e","brand":"SeaSure","offers":[{"title":"Default Title","offer_id":44937105211481,"sku":"100430","price":54.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/100430XL.jpg?v=1789838606"},{"product_id":"seasure-25mm-treble-block-with-shackle-00-31crd-marine-grade-stainless-steel","title":"SeaSure 25mm Treble Block with Shackle 00.31CRD, Marine-Grade Stainless Steel","description":"\u003cp\u003e\u003cstrong\u003e25mm Treble Block with Shackle\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe 25mm plain bearing block range is one of SeaSure's oldest and best-selling ranges. The range uses marine-grade stainless steel side plates and rivets with an arnite (plastic) sheave, which is incredibly hard-wearing and light.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eThis range could be used to create purchasing systems for lifting, garage door mechanisms, storage solutions, etc.\u003c\/li\u003e\n\u003cli\u003eThe 00.31 can be used to create a 6:1 purchase system to aid in lifting heavier objects and decrease the load on the rope\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eMax Rope: 8mm\u003c\/li\u003e\n\u003cli\u003eBreaking Load: 1250kg\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\n\u003cp\u003eThe SeaSure 25mm Treble Block with Shackle, part number 00.31CRD, is a compact, lightweight pulley block designed for rope purchase systems and mechanical advantage applications. Built for customers who need a dependable block for marine, lifting, garage door, or storage-system projects, this treble block helps organize rope movement while supporting systems designed to reduce the load on the rope.\u003c\/p\u003e\u003cp\u003ePart of SeaSure’s established 25mm plain bearing block range, the 00.31CRD combines marine-grade stainless steel side plates and rivets with a hard-wearing arnite plastic sheave. The lightweight construction makes it practical for applications where durable components and manageable system weight are important. Its treble-block configuration can be used to create a 6:1 purchase system for lifting heavier objects, depending on the complete system design and setup.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTreble block design:\u003c\/strong\u003e Supports multi-part purchase systems for lifting and rope-management applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e6:1 purchase capability:\u003c\/strong\u003e Can be used to create a 6:1 purchase system to aid in lifting heavier objects and decrease the load on the rope.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMarine-grade construction:\u003c\/strong\u003e Stainless steel side plates and rivets provide the specified material construction for demanding system applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHard-wearing sheave:\u003c\/strong\u003e Arnite plastic sheave offers a lightweight component for compatible rope systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBroad application range:\u003c\/strong\u003e Suitable for lifting systems, garage door mechanisms, storage solutions, and related projects.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eProduct Details:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e SeaSure\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 00.31CRD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e 25mm treble block with shackle\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Rope Size:\u003c\/strong\u003e 5\/16 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBreaking Load:\u003c\/strong\u003e 2,756 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterials:\u003c\/strong\u003e Marine-grade stainless steel side plates and rivets with an arnite plastic sheave\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApproximate Overall Size:\u003c\/strong\u003e 3 inches long x 3 inches wide x 1 inch high\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApproximate Weight:\u003c\/strong\u003e 0.39 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eChoose the SeaSure 25mm Treble Block with Shackle 00.31CRD when you need a compact block for building practical rope purchase and lifting systems.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSEO Meta Description:\u003c\/strong\u003e Shop the SeaSure 25mm Treble Block with Shackle 00.31CRD for durable rope purchase systems, lifting setups, and storage applications.\u003c\/p\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\n\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cbr\u003e","brand":"SeaSure","offers":[{"title":"Default Title","offer_id":44937105440857,"sku":"100427","price":72.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/100427XL.jpg?v=1789838619"},{"product_id":"seasure-25mm-double-block-with-shackle-00-21crd-marine-grade-stainless-steel","title":"SeaSure 25mm Double Block with Shackle 00.21CRD, Marine-Grade Stainless Steel","description":"\u003cp\u003e\u003cstrong\u003e25mm Double Block with Shackle\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe 25mm plain bearing block range is one of SeaSure's oldest and best-selling ranges. The range uses marine-grade stainless steel side plates and rivets with an arnite (plastic) sheave, which is incredibly hard-wearing and light.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eThis range could be used to create purchasing systems for lifting, garage door mechanisms, storage solutions, etc.\u003c\/li\u003e\n\u003cli\u003eThe 00.21 can be used to create a 4:1 purchase system to aid in lifting heavier objects and decrease the load on the rope\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eMax Rope: 8mm\u003c\/li\u003e\n\u003cli\u003eBreaking Load: 1000kg\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\n\u003cp\u003eThe SeaSure 25mm Double Block with Shackle, part number 00.21CRD, is a compact plain-bearing block designed for lifting systems, storage solutions, garage door mechanisms, and other applications that use rope purchase systems. Its marine-grade stainless steel side plates and rivets provide a durable construction, while the lightweight, hard-wearing arnite plastic sheave supports smooth, practical operation.\u003c\/p\u003e\u003cp\u003eDesigned for rope systems requiring mechanical advantage, the SeaSure 00.21CRD can be used to create a 4:1 purchase system. This configuration helps make lifting heavier objects more manageable by reducing the load placed on the rope. With support for rope up to 8mm and a 1000kg breaking load, this double block is suited to a variety of equipment and utility applications where a compact block-and-shackle design is needed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDouble block with shackle:\u003c\/strong\u003e Provides a practical component for building rope-based lifting and purchase systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMarine-grade stainless steel construction:\u003c\/strong\u003e Stainless steel side plates and rivets support durable everyday use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eArnite plastic sheave:\u003c\/strong\u003e Lightweight and hard-wearing for practical operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4:1 purchase capability:\u003c\/strong\u003e The 00.21CRD can be used to create a system that helps reduce the load on the rope when lifting heavier objects.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersatile applications:\u003c\/strong\u003e Suitable for lifting systems, garage door mechanisms, storage solutions, and similar rope-system projects.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eProduct Details:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e SeaSure\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e 00.21CRD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct type:\u003c\/strong\u003e 25mm double block with shackle\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum rope size:\u003c\/strong\u003e 8mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBreaking load:\u003c\/strong\u003e 1,000 kilograms\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e Marine-grade stainless steel side plates and rivets with an arnite plastic sheave\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eChoose the SeaSure 25mm Double Block with Shackle 00.21CRD for a durable, lightweight component when building practical rope purchase and lifting systems.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSEO Meta Description:\u003c\/strong\u003e Shop the SeaSure 25mm Double Block with Shackle 00.21CRD for lifting systems, 8mm rope, durable stainless steel, and a 1,000kg breaking load.\u003c\/p\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\n\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cbr\u003e","brand":"SeaSure","offers":[{"title":"Default Title","offer_id":44937105670233,"sku":"100418","price":40.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/100418XL.jpg?v=1789838630"},{"product_id":"seasure-25mm-single-block-with-becket-00-11crd","title":"SeaSure 25mm Single Block with Becket 00.11CRD","description":"\u003cp\u003e\u003cstrong\u003e25mm Single Block with Becket\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe 25mm plain bearing block range is one of SeaSure's oldest and best-selling ranges. The range uses marine-grade stainless steel side plates and rivets with an arnite (plastic) sheave, which is incredibly hard-wearing and light.                            \u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eThis range could be used to create purchasing systems for lifting, garage door mechanisms, storage solutions, etc.\u003c\/li\u003e\n\u003cli\u003eThe 00.11 features a becket at one end and a clevis pin attachment at the other, so this block could be used for creating a purchase system and easily attached to a fixing point with the clevis pin attachment\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eMax Rope: 8mm\u003c\/li\u003e\n\u003cli\u003eBreaking Load: 500kg\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\n\u003cp\u003e\u003cstrong\u003eSeaSure 25mm Single Block with Becket 00.11CRD\u003c\/strong\u003e is a compact, lightweight plain bearing block designed for rope purchase systems and practical lifting or storage applications. Built with marine-grade stainless steel side plates and rivets, this single block combines durable construction with a hard-wearing arnite plastic sheave for reliable everyday use.\u003c\/p\u003e\u003cp\u003eThe 00.11CRD model features a becket at one end and a clevis pin attachment at the other. This configuration allows the block to be incorporated into a purchase system while providing a convenient way to connect it to a fixed point. Its 25mm sheave size and support for rope up to 8mm make it suitable for a range of marine, workshop, garage door, and storage-system applications where a compact block is needed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMarine-grade stainless steel construction:\u003c\/strong\u003e Side plates and rivets provide a durable structure for demanding applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eArnite plastic sheave:\u003c\/strong\u003e The lightweight, hard-wearing sheave supports smooth rope handling in a compact design.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBecket and clevis pin attachment:\u003c\/strong\u003e Connect the block to a fixing point while building a purchase system.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e25mm single block design:\u003c\/strong\u003e Provides a practical solution for compact rope-routing and lifting setups.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersatile applications:\u003c\/strong\u003e Suitable for purchase systems, lifting arrangements, garage door mechanisms, and storage solutions.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eProduct Details:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e SeaSure\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 00.11CRD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlock Type:\u003c\/strong\u003e Single block with becket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSheave Size:\u003c\/strong\u003e 25mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Rope Size:\u003c\/strong\u003e 8mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBreaking Load:\u003c\/strong\u003e 500kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterials:\u003c\/strong\u003e Marine-grade stainless steel side plates and rivets with an arnite plastic sheave\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAttachment:\u003c\/strong\u003e Clevis pin attachment\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eChoose the SeaSure 25mm Single Block with Becket 00.11CRD for a durable, adaptable component in compact purchase systems and rope-handling applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSEO Meta Description:\u003c\/strong\u003e SeaSure 25mm single block with becket and clevis pin attachment. Marine-grade stainless steel construction, 8mm rope capacity, and 500kg breaking load.\u003c\/p\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\n\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cbr\u003e","brand":"SeaSure","offers":[{"title":"Default Title","offer_id":44937105899609,"sku":"100411","price":34.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/100411XL.jpg?v=1789838642"},{"product_id":"harken-38mm-double-big-bullet-block-with-becket-part-128","title":"Harken 38mm Double Big Bullet Block with Becket, Part 128","description":"\u003cp\u003e\u003cstrong\u003e38mm Double Big Bullet Block with Becket\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eLow-friction Bullet blocks lead control lines aft. They are compact and lightweight, with fast trim and release under high or low loads. A range of styles lets these blocks adapt to almost all control line applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSheave: 38mm (1-1\/2\")\u003c\/li\u003e\n\u003cli\u003eMaximum Line: 10mm (3\/8\")\u003c\/li\u003e\n\u003cli\u003eMaximum Working Load: 272kg (600lb)\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\n\u003cp\u003e\u003cstrong\u003eHarken 38mm Double Big Bullet Block with Becket\u003c\/strong\u003e is a compact, lightweight solution for leading control lines aft on sailboats and other marine control-line systems. Designed for fast trim and release under both high and low loads, this double bullet block helps sailors manage control lines efficiently while adapting to a wide range of applications.\u003c\/p\u003e\u003cp\u003ePart 128 features two 38mm (1-1\/2-inch) sheaves and a becket for versatile control-line routing. Its low-friction bullet block design supports responsive line handling, making it suitable for applications where smooth trimming, quick release, and compact hardware are important. The block accommodates line up to 10mm (3\/8-inch) and has a maximum working load of 600 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKEY FEATURES:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow-friction design:\u003c\/strong\u003e Helps provide fast control-line trim and release under high or low loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDouble sheave configuration:\u003c\/strong\u003e Supports control-line routing in a compact block format.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated becket:\u003c\/strong\u003e Adds versatility for control-line system layouts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMarine-ready application:\u003c\/strong\u003e Designed to lead control lines aft on sailboats and adapt to many control-line uses.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e10mm line capacity:\u003c\/strong\u003e Accommodates line up to 3\/8 inch.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003ePRODUCT DETAILS:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Harken\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e 128\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct type:\u003c\/strong\u003e Double Big Bullet Block with Becket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSheave size:\u003c\/strong\u003e 38mm (1-1\/2 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum line size:\u003c\/strong\u003e 10mm (3\/8 inch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum working load:\u003c\/strong\u003e 600 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 block\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eChoose the Harken 38mm Double Big Bullet Block with Becket for compact, responsive control-line handling in marine rigging applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSEO META DESCRIPTION:\u003c\/strong\u003e\u003cbr\u003eShop the Harken 38mm Double Big Bullet Block with Becket, Part 128, for low-friction control-line routing and fast trim on sailboats.\u003c\/p\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\n\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eTruck Freight: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eOversized: No\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cbr\u003e","brand":"Harken","offers":[{"title":"Default Title","offer_id":44937106980953,"sku":"84720","price":111.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/84720XL.jpg?v=1789838688"}],"url":"https:\/\/www.marinepartsonly.com\/collections\/blocks.oembed?page=4","provider":"Marine Parts Only","version":"1.0","type":"link"}