{"product_id":"ronstan-series-20-ball-bearing-block-upright-lead","title":"Ronstan Series 20 Ball Bearing Block - Upright Lead – Marine Boat Replacement Part","description":"\u003cp\u003e\u003cstrong\u003eRonstan Series 20 Ball Bearing Block - Upright Lead – Marine Boat Replacement Part\u003c\/strong\u003e is organized for anchoring, docking \u0026amp; mooring shoppers who need a clear, professional marine parts buying experience.\u003c\/p\u003e\u003cp\u003eSeries 20 Ball Bearing Block - Upright Lead Features: Lead 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 stainless steel or Torlon® ball bearings provide high performance \u0026amp; low friction Applications: Typically used for halyards at the mast base Materials: U.V. Stabilized Acetal sheaves Stainless steel ball bearings \u0026amp; Load housing Specifications: Sheave Ø: 20mm(3\/4\") Max. Rope Ø: 6mm(1\/4\") Fastener Ø: 4mm(5\/32\") M.W.L.: 250kg(550lbs) B. L.: 550kg(1,210lbs) Weight: 18g(0.6oz)\u003c\/p\u003e\u003ch3\u003eFitment \u0026amp; Product Details\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eBrand \/ Manufacturer: Ronstan\u003c\/li\u003e\n\u003cli\u003eMaterial: stainless steel\u003c\/li\u003e\n\u003c\/ul\u003e\u003cul\u003e\n\u003cli\u003eSearch-optimized by brand, system, part type, and fitment cues.\u003c\/li\u003e\n\u003cli\u003eVerify compatibility with your original part number, engine model, and application before ordering.\u003c\/li\u003e\n\u003cli\u003eBuilt for boat owners, e-commerce shoppers, and professional marine service teams.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Ronstan","offers":[{"title":"Default Title","offer_id":42886187647065,"sku":"55137","price":24.08,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/244615168.jpg?v=1764620025","url":"https:\/\/www.marinepartsonly.com\/products\/ronstan-series-20-ball-bearing-block-upright-lead","provider":"Marine Parts Only","version":"1.0","type":"link"}