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

Maximum working load (lb)150 lb

More choices allow sailors to fine-tune their set-ups in tandem with the purchase that provides the ideal level of power

Handle not included

covers and other vinyl surfaces

Breaking load (kg)1400 kg

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.