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): 132 mm
• Length (in): 5 3/16 in
• Weight (g): 336 g
• Weight (oz): 11.86 oz
• Shackle pin Ø (mm): 8 mm
• Shackle pin Ø (in): 5/16 in
• Maximum line Ø (mm): 12 mm
• Maximum line Ø (in): 7/16 in
• Maximum working load (kg): 1633 kg
• Maximum working load (lb): 3600 lb
• Breaking load (kg): 3267 kg
• Breaking load (lb): 7200 lb