HARKEN High Load Block 57 mm Pulley

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. Specifications: - Sheave Ø (mm): 57 mm - Sheave Ø (in): 2 1/4 in - Length (mm): 119 mm - Length (in): 4 11/16 in - Weight (g): 152 g - Weight (oz): 5.36 oz - Shackle pin Ø (mm): 6 mm - Shackle pin Ø (in): 1/4 in - Maximum line Ø (mm): 12 mm - Maximum line Ø (in): 7/16 in - Maximum working load (kg): 1134 kg - Maximum working load (lb): 2500 lb - Breaking load (kg): 2268 kg - Breaking load (lb): 5000 lb