{"product_id":"harken-2638-40mm-carbo-air-double-swivel-block","title":"Harken 2638 40mm Carbo Air Double Swivel Block","description":"\u003cp\u003e\u003cstrong\u003e40mm Carbo Air Double Swivel Block\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eLow-friction Carbo Air blocks are lightweight, strong, reliableand affordable. Companions to the popular Harken Black Magic block line, these small, compact blocks have very high working loads for safe, easy trimming.\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)440 kg\u003c\/li\u003e\n\u003cli\u003eMaximum working load (lb)970 lb\u003c\/li\u003e\n\u003c\/ul\u003e \u003c!--- cis2:m2lsl5xp ---\u003e\n\u003cp\u003e\u003cstrong\u003eHarken 2638 40mm Carbo Air Double Swivel Block\u003c\/strong\u003e is a compact, lightweight sailing block designed for reliable line control and easy trimming. Built for sailors who need strong, efficient hardware in a small format, this double swivel block supports lines up to 3\/8 inch and delivers a maximum working load of 970 pounds.\u003c\/p\u003e\u003cp\u003ePart of Harken's Carbo Air block range, the 40mm block combines low-friction performance with a compact design. It is a practical choice for sailboat rigging applications where smooth trimming, dependable operation, and efficient use of space matter. The double swivel configuration allows the block to align with changing line direction during use, helping support responsive control in a variety of sailing systems.\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 Supports smooth line movement for easier trimming.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDouble swivel configuration:\u003c\/strong\u003e Helps the block align with changing line direction in sailing applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact and lightweight construction:\u003c\/strong\u003e Provides efficient hardware for space-conscious rigging setups.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh working load:\u003c\/strong\u003e Handles loads up to 970 pounds for dependable sailboat line control.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLine compatibility:\u003c\/strong\u003e Accepts 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 2638\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct type:\u003c\/strong\u003e 40mm Carbo Air double swivel block\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSheave diameter:\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 970 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eChoose the Harken 2638 Carbo Air Double Swivel Block for compact, low-friction performance in dependable sailing rigging systems.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSEO Meta Description:\u003c\/strong\u003e Harken 2638 40mm Carbo Air Double Swivel Block delivers low-friction line control, a 970-pound working load, and support for lines up to 3\/8 inch.\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":44937129263193,"sku":"79734","price":97.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0623\/1818\/2489\/files\/79734XL.jpg?v=1789839496","url":"https:\/\/www.marinepartsonly.com\/products\/harken-2638-40mm-carbo-air-double-swivel-block","provider":"Marine Parts Only","version":"1.0","type":"link"}