Harken 40mm Double Block — Swivel, Becket RHKYC-Branded Rowing & Paddling Clothing Maximum working load (lb)400 lb

Maximum working load (lb)400 lb

Shallow bow shackles are proportionally wider for their length than regular bow shackles

Weight (oz)6 oz

Forged stainless steel shackles are polished to a high luster and are stamped with the screw pin diameter

Length (mm)157 mm

Harken 40mm Double Block — Swivel, Becket RHKYC-Branded Rowing & Paddling Clothing Maximum working load (lb)400 lbPart No. 2639 Sheave (mm)40 mm Sheave (in)1 9 16 in Maximum line (mm)10 mm Maximum line (in)3 8 in Maximum working load (kg)440 kg Maximum working load (lb)970 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.