Harken 40mm Carbo Air Triple Swivel Block [2640] Brand_Blue Sea Systems Non-return valves help priming and

Non-return valves help priming and prevent backflow of water into the bilge

Navimount Base Lights will work with Railblaza mounting systems

Totally waterproof (submersible from 10m)

For use with the original Dual Action Polisher

Backed with solid one-piece construction

Harken 40mm Carbo Air Triple Swivel Block [2640] Brand_Blue Sea Systems Non-return valves help priming and40mm Carbo Air Triple Swivel Block 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 Quick Guide (pdf)