Harken 57mm Carbo Quad Block - Swivel [2631] Anchoring & Docking | Fenders When they are connected in

When they are connected in this way

No moving parts

Corrosion resistant and rain-proof rated for outdoor use

Advanced Hella marine lens technology provides a safe

Harken 57mm Carbo Quad Block - Swivel [2631] Anchoring & Docking | Fenders When they are connected in57mm Carbo Quad Block Swivel Low 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. Features: Sheave (mm) 57 mm Sheave (in) 2 1 4 in Maximum line (mm) 10 mm Maximum line (in) 3 8 in Maximum working load (kg) 1080 kg Maximum working load (lb) 2380 lb