Harken 40mm Carbo Air Triple Swivel Block w/Becket FHDOOR3 the B31-Series delivers powerful performance

the B31-Series delivers powerful performance and unmatched convenience

Integrated 65A automatic charging relay

MERCURY 50-79472T2

The A200 delivers comprehensive AIS functionality

188 lb (540 kg)

Harken 40mm Carbo Air Triple Swivel Block w/Becket FHDOOR3 the B31-Series delivers powerful performance40mm Carbo Air Triple Swivel Block with Becket 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. Specifications: 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)660 kg Maximum working load (lb)1455 lb