Marine Deck Organiser Size 2, 3-sheave, Spectro Grey | 4BoatsDeck organiser to divert mast base control lines back to the cockpit; compact Size 2 with 3 sheave layout to keep lines clear of genoa sheets. Size 2 3 sheave organiser Spectro grey anodised aluminium sides and base; also available in black anodised Acetal sheaves running on a 316 stainless steel hollow rivet Fixing bolts not supplied Hole centres: 58 mm (2. 28 in) Suitable for yachts above 9. 75 m (32 ft) and halyards up to 14 mm (9 16 in)