2nd Density support

Over inflated buoyancy bags may burst when heated up by the sun or rising temperatures

They are precision machined to eliminate seepage and odour problems

Size shown is the BSP thread size

Harken 40mm Triple Block — Swivel, Becket HK2641 rf25 2nd Density supportLow 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. Sheave (mm) 40 mm Sheave (in) 1 9 16 in Length (mm) 110 mm Length (in) 4 5 16 in Weight (g) 122 g Weight (oz) 4. 7 oz Shackle pin (mm) 5 mm Shackle pin (in) 3 16 in Maximum line (mm) 10 mm Maximum line (in) 3 8 in Maximum working load (kg) 660