Ronstan RF51712 Series 50 Exit Block – 50mm Sheave, High LoadThe Ronstan RF51712 Series 50 High Load Exit Block is engineered for high performance sailing applications, offering exceptional strength to weight ratio. Featuring a 50mm Nylatron sheave, this block accommodates rope diameters up to 12mm and wire up to 5mm. Its plain bearing design ensures smooth operation under high static loads, with a maximum working load of 750kg and a breaking load of 1500kg. The Grade 316 stainless steel cheeks provide

Coastal cruising

ensuring cleaner fuel and smoother engine performance on every trip

The diaphragm assembly can be rotated for variable pumping positions

Ideal for replacing old lines or setting up a new outboard fuel system with confidence

UV-resistant acetal sheaves for smooth

high-strength 30mm Orbit pulley block designed for dinghies

Built from UV-resistant

and premium swivel

International Ultra 2 Antifoul (4L) is a premium hard antifouling paint designed for high-speed vessels

updated with current Notices to Mariners

Brand: Ronstan

✅ Powerful self‑priming pump