Harken 57mm Double Block — Swivel, Becket Dinghy & Hardware Maximum working load (lb)150 lb

Maximum working load (lb)150 lb

Breaking load (kg)1400 kg

Stamped shackles are used on most Harken Small Boat Blocks and are appropriate for low loads

Length (mm)86 mm

Name Value Best Use Hull Cleaner

Harken 57mm Double Block — Swivel, Becket Dinghy & Hardware Maximum working load (lb)150 lbPart No. 2603 Sheave (mm)57 mm Sheave (in)2 1 4 in Maximum line (mm)10 mm Maximum line (in)3 8 in Maximum working load (kg)720 kg Maximum working load (lb)1584 lb Low friction Carbo Air blocks are lightweight, strong, reliableand affordable. Companions to the popular Harken Black Magic block line, these small, compact blocks have very high working loads for safe, easy trimming.