Harken 57mm Aluminum Low-Load Double Block - Swivel $955.74 Qty Out of Stock This item will be shipped within 10 days. Enter your e-mail address to be notified when product is in stock Notify Me! Add Review Ask Question Product Description Reviews (0) Questions Black 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 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 headposts. Torlon is a registered trademark of Solvay Advanced Polymers L.L.C Currently there are no reviews for this product. Currently there are no questions for this product. Similar Products Harken 16mm Forkhead Block HK376 $52.81 $39.08 View... Harken 60mm Aluminum Element Single Block � Swivel, Becket HK6261 $175.24 $129.68 View... Ronstan Series 50 AP Block with Fiddle RF51500 $78.90 View... Ronstan 20mm Ball Bearing double, becket, 2-axis shackle head block RF20212 $38.17 $30.54 View...

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