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. Sjakkel Blokks 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 Blokks have 17-4 PH stainless headposts.
Torlon is a registered trademark of Solvay Advanced Polymers LLC
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