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