{"product_id":"lewmar-60mm-synchro-block-double-black-5-16-3-8-line-239-29926002bk","title":"Lewmar 60mm Synchro Block – Double, Black, 5\/16”–3\/8” Line","description":"\u003ch2\u003eTwo-Sheave Efficiency for Mid-Size Running Rigging\u003c\/h2\u003e\u003cp\u003eThe Lewmar 60mm Synchro Double Block delivers smooth, low-friction performance across two sheaves in a compact, lightweight package. Its high-density, free-spin plain bearing and self-aligning swivel head minimize friction under load, keeping lines running cleanly whether you’re sheeting in, easing out, or redirecting a control line. The patented shackle post lock makes attachment and removal fast and secure without tools.\u003c\/p\u003e\u003cp\u003eStainless steel straps and glass-fibre reinforced cheeks provide the durability performance sailors demand, while the matched sheave, bearing, pin, and line sizing ensures optimum efficiency across the 5\/16”–3\/8” line range.\u003c\/p\u003e\u003ch3\u003eCompatible Applications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eTwo-part sheet and halyard systems\u003c\/li\u003e\n\u003cli\u003eMainsheet and traveler systems requiring two-line leads\u003c\/li\u003e\n\u003cli\u003eRunning rigging on performance sailboats\u003c\/li\u003e\n\u003cli\u003eMulti-part purchase systems (working end, paired with a becket block)\u003c\/li\u003e\n\u003cli\u003eLine sizes: 5\/16” to 3\/8” (8–10mm)\u003c\/li\u003e\n\u003cli\u003eBlock size: 60mm sheave diameter\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eProduct Details\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eConfiguration: Double sheave\u003c\/li\u003e\n\u003cli\u003eSheave diameter: 60mm\u003c\/li\u003e\n\u003cli\u003eLine range: 5\/16”–3\/8” (8–10mm)\u003c\/li\u003e\n\u003cli\u003eColor: Black\u003c\/li\u003e\n\u003cli\u003eBearing: High-density free-spin plain bearing\u003c\/li\u003e\n\u003cli\u003eHead: Self-aligning swivel\u003c\/li\u003e\n\u003cli\u003eConstruction: Stainless steel straps, glass-fibre reinforced cheeks\u003c\/li\u003e\n\u003cli\u003eAttachment: Patented shackle post lock\u003c\/li\u003e\n\u003cli\u003eSKU: 239-29926002BK\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eParts Desk Insights\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eBest Use Case:\u003c\/strong\u003e The plain double block is the working end of a purchase system — pair it with a \u003ca href=\"\/products\/lewmar-60mm-synchro-block-double-w-becket-black-5-16-3-8-line-239-29926005\"\u003eDouble with Becket\u003c\/a\u003e or \u003ca href=\"\/products\/lewmar-60mm-synchro-block-single-w-becket-black-5-16-3-8-line-239-29926004\"\u003eSingle with Becket\u003c\/a\u003e to build a 3:1 or 4:1 mainsheet or vang system. It’s also useful anywhere you need to run two lines through a single attachment point without the added weight of a cam or becket. The 60mm size is well-suited to mid-size performance sailboats running 5\/16”–3\/8” line.\u003c\/p\u003e\u003ch3\u003eOther 60mm Synchro Blocks\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/lewmar-60mm-synchro-block-single-black-5-16-3-8-line-239-29926001bk\"\u003e60mm Synchro Block – Single, Black\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/lewmar-60mm-synchro-block-triple-black-5-16-3-8-line-239-29926003\"\u003e60mm Synchro Block – Triple, Black\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/lewmar-60mm-synchro-block-single-w-becket-black-5-16-3-8-line-239-29926004\"\u003e60mm Synchro Block – Single with Becket, Black\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/lewmar-60mm-synchro-block-double-w-becket-black-5-16-3-8-line-239-29926005\"\u003e60mm Synchro Block – Double with Becket, Black\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/lewmar-60mm-synchro-triple-block-becket-cam-black-29926010bk\"\u003e60mm Synchro Block – Triple with Becket \u0026amp; Cam, Black\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/lewmar-60mm-synchro-halyard-block-black-29926021\"\u003e60mm Synchro Halyard Block, Black\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/lewmar-60mm-synchro-block-fiddle-w-becket-black-5-16-3-8-line-239-29926034\"\u003e60mm Synchro Block – Fiddle with Becket, Black\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/lewmar-60mm-synchro-block-fiddle-w-cam-black-5-16-3-8-line-239-29926037\"\u003e60mm Synchro Block – Fiddle with Cam, Black\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOther Synchro Block Sizes\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/lewmar-50mm-synchro-block-single-black-1-4-3-8-line-239-29925001bk\"\u003e50mm Synchro Blocks – 1\/4”–3\/8” Line\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/lewmar-72mm-synchro-block-single-black-3-8-1-2-line-239-29927201\"\u003e72mm Synchro Blocks – 3\/8”–1\/2” Line\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/lewmar-90mm-synchro-block-single-w-becket-black-1-2-9-16-line-239-29929004\"\u003e90mm Synchro Blocks – 1\/2”–9\/16” Line\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003ePair It With\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e\u003ca href=\"\/products\/lewmar-synchro-snap-shackle-239-29926040\"\u003eLewmar Synchro Snap Shackle – 60mm\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e","brand":"LNS","offers":[{"title":"Default Title","offer_id":51250740363300,"sku":"239-29926002BK","price":145.41,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/239-29925002BK_771b0e7b-78eb-41c1-9896-9a7cec4fad90.jpg?v=1786509423","url":"https:\/\/marisolmarine.com\/products\/lewmar-60mm-synchro-block-double-black-5-16-3-8-line-239-29926002bk","provider":"Marisol Marine Company","version":"1.0","type":"link"}