57mm Aluminum Low Load Black Magic Block with Swivel
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 the 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 head posts. Torlon is a registered trademark of Solvay Advanced Polymers L.L.C.
Specifications:
- Sheave: 57mm/2-1/4in
- Length: 119mm/4-11/16in
- Weight: 154g/5.44oz
- Shackle Pin: 6mm/1/4in
- Maximum Line: 12mm / 7/16in
- Maximum Working Load: 7/16kg / 1655lbs
- Breaking Load: 1500kg / 3300lb
![Harken 57mm Aluminum Low Load Black Magic Block w/Swivel [3226] - Essenbay Marine](http://essenbaymarine.com/cdn/shop/products/93959XL_{width}x.jpg?v=1680061763)
![Harken 57mm Aluminum Low Load Black Magic Block w/Swivel [3226] - Essenbay Marine](http://essenbaymarine.com/cdn/shop/products/93959XL_1024x.jpg?v=1680061763)