Product Description
Harken 57mm Aluminum Double Loop Block
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. The sheave center carries primary load, allowing a smaller, lighter weight block. The soft-attachment Loop block has a removable deadend post for attachment to a padeye. Lashings can also be used.
Torlon is a registered trademark of Solvay Advanced Polymers L.L.C.
Sheave Ø (mm) - 57
Sheave Ø (in) - 2 1/4
Length (mm) - 76
Length (in) - 3"
Maximum line Ø (mm) - 12
Maximum line Ø (in) - 7/16
Maximum working load (kg) - 1134
Maximum working load (lb) - 2500
Weight (g) - 168
Weight (oz) - 5.93
Breaking load (kg) - 2268
Breaking load (lb) - 5000
