Harken Aluminum Loop Air Block – 57mm

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 dead-end post for attachment to a padeye. Lashings can also be used.

Sheave (mm)57 mm
Sheave (in)2 1/4 in
Maximum line (mm)12 mm
Maximum line (in)7/16 in
Maximum working load (kg)1134 kg
Maximum working load (lb)2500 lb