Harken 57mm Carbo 8:1 System

Murrays Part# 28-81

Lightweight, low profile and very strong, these Carbo AirBlocks® have enormous working range, with a higher working load than standard blocks, even though they are lighter in weight! The Carbo Ratchmatic® is a load-sensing ratchet block that rolls freely in both directions under low loads, and automatically engages the ratchet as loads increase. Shifting between ratchet and light air modes is seamless. Unloaded the sheet runs freely during mark roundings and jibes. Ratchet engagement may be adjusted to a higher or lower load according to strength and sailing style.

Lower Block: 57mm Triple with becket Carbo Ratchamatic Base with an 40mm carbo single above the cleat.

Upper Block: 57mm Quad boom block

Line is not included

Safe working load is 1800 pounds; breaking strength is 4500 pounds