Barton Marine Deck Organizer - Size 2 - 2 Sheave - BlackBarton Marine Deck Organizer Size 2, 2 Sheave Black is designed to divert mast base control lines and halyards back to the cockpit, letting you sail from the security and comfort of the cockpit. Ideal for boats up to 32' (9. 75 m) with halyard sizes up to 9 16" (14 mm), this deck organizer can be double stacked to maximize line management in tight, crowded cockpit areas. Durable construction: Spectro anodized aluminum provides excellent corrosion