Ronstan Ratchet Orbit Blocks, Series 40 - Single, Manual, Swivel Shackle Head sale These brackets fasten to the

These brackets fasten to the top of the carburetor base plate while using existing hardware

The 2 Boston valves have different thread patterns

Supplied with flange

Suits attachment to 14mm (9/16”) wide mast collar post

Constructed from robust Roto-Mould plastic

Ronstan Ratchet Orbit Blocks, Series 40 - Single, Manual, Swivel Shackle Head sale These brackets fasten to theFeatures: Up to 14: 1 holding power highest available! Smooth easing of sheets Manual ON OFF ratchet selection Swivel shackle head for unlimited block rotation. Stainless steel shackle head and compatibility with sharp fixing points Application: Dinghy mainsheet systems Mainsheet fine tune systems on sportsboats & small keel boats Mainsheet systems on sportsboats using RF7 mainsheet swivel cleat unit Spinnaker and job sheets on dinghies especially