Ronstan RF51200 50mm Double Block | Series 50 Stainless Sailing PulleyThe Ronstan RF51200 is a durable and efficient 50mm double pulley block, designed for medium load rigging applications on dinghies, keelboats, and small yachts. With twin sheaves and 316 stainless steel cheeks, this block delivers smooth, low friction performance in tough marine conditions. Ideal for control lines, vang systems, cunninghams, and other multi line setups, the RF51200 is built to handle demanding sailing environments. The UV resistant

the P6113 offers secure mounting without needing deck penetrations

Marine safety education

and marine equipment

non-marking marine-grade rubber

this small block delivers impressive strength for its size

improving both visibility and the chances of a fast

it’s built to endure while providing smooth

your reliable supplier of quality bilge pumps and marine safety equipment

Its aerodynamic design and adjustable reference tabs make it easy to install and calibrate

Compatible with Notices to Mariners updates (always check corrections)

Cam cleat included – fast and secure line handling

UV-resistant construction makes it perfect for New Zealand’s marine conditions