This 40mm Double Boat Block, with Swivel, is Harken’s lightweight and low-friction companion to their already exceedingly popular range of Black Magic boat blocks.
Capable of taking on very high working loads, this strong boat block is ideal for safe, easy trimming.
Specially designed for main, jib and spinnaker sheets on sportboats and dinghies of all sizes, the 40mm carbo air double blocks with swivel 2638 are smooth-running and powerful performers that make trimming easy in the most challenging wind situation.
Made of a lightweight, strong and reliable fibre-reinforced composite construction they come in various sizes and types to fit any system. Due to the UV-stabilizer on ball bearings, sheave and sideplates they are made to stand up to sun, salt and time.
The free-running ball bearings roll on curved races, being very efficient dispersing the load from a higher strength block, are made from a Delrim acetal UV-Stabilized resin.
Specifications
Working Load: 440kg
Breaking Load: 1080kg
Max Line: 10mm
Sheave: 40mm
Shackle Pin: 5mm
Weight: 86g
