Harken 29mm Double Block 381 wide Brim 3D mesh lines the upper

3D mesh lines the upper back for extra comfort

stainless steel ball bearings and inner race

25mm x 3mm Gal strap

Super grip with a flexible sole

Harken 29mm Double Block 381 wide Brim 3D mesh lines the upperLow friction Carbo Air blocks are lightweight, strong, reliableand affordable. Companions to our popular Harken Big Boat blocks, these small, compact blocks have very high working loads for safe, easy trimming. Sheave (mm) 29 mm Sheave (in) 1 1 8 in Length (mm) 54 mm Length (in) 2 1 8 in Weight (g) 34 g Weight (oz) 1. 2 oz Maximum line (mm) 8 mm Maximum line (in) 5 16 in Maximum working load (kg) 299 kg Maximum working load (lb) 660 lb Breaking load