Harken 40mm Double Block — Swivel Father's Day 2023 Doubles feature composite line guides

Doubles feature composite line guides that are integrated into the block head

Maximum working load (lb)2800 lb

Maximum working load (lb) 792 lb

They form light-duty mounting bases for blocks

A length of Spectra® line with a polyester cover is included

Harken 40mm Double Block — Swivel Father's Day 2023 Doubles feature composite line guidesPart No. 2638 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.