Harken 57mm Carbo Ratchet Block

For great mainsheet control! Manual on-off switch for ratchet on both sides of block.

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For great mainsheet control! Manual on-off switch for ratchet on both sides of block.

For great mainsheet control!
Manual on-off switch for ratchet on both sides of block.
5 year limited warranty from Harken
40mm sheave recommended for Optimist, Laser, Sunfish
Consider 57mm sheave for Vanguard 15 and 420.