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They form light-duty mounting bases for blocks
Resists Damage From The Sun's UV Rays
Closed back design completely insulates power from the mounting surface
On a power-driven vessel of 12 meters or more in length but less than 50 meters in length:
Harken Ratchamatic Double Swivel Carbo Block - 57mm Blue Sea Systems They form light-duty mounting basesThe Carbo Ratchamatic 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. Use the 2634 with a 402 or 403 swivel arm for a versatile two speed mainsheet system.
