Ronstan Series 40 BB Single Orbit Block - Manual, Swivel Shackle Head Product Number:RF46100M Ensure the valve is installed

Ensure the valve is installed with the arrow pointing in direction of water flow

No separate bilge switch required

Does not weaken fabric or thread

Loop Head - RF40101

Ronstan Series 40 BB Single Orbit Block - Manual, Swivel Shackle Head Product Number:RF46100M Ensure the valve is installedRonstan Series 40 Ball Bearing Single Orbit Block, Manual, Swivel Shackle Head RF46100M 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 Applications Dinghy mainsheet systems Mainsheet fine tune systems on sportsboats & small keel boats Mainsheet systems on sportsboats using RF7