Ronstan RF51140 50mm Stand-Up Pulley Block | Series 50 Stainless Sailing BlockThe Ronstan RF51140 is a compact and reliable 50mm stand up pulley block, designed for deck mounted control systems on dinghies, keelboats, and small yachts. As part of the Ronstan Series 50, it features a UV resistant acetal sheave and 316 stainless steel cheeks, providing excellent durability and smooth performance. The stand up base keeps the block upright, ensuring consistent line alignment for outhauls, vangs, sheets, and other control lines.

and a must-have for any safety-conscious Kiwi

The Ronstan RF45201 Double Block is a versatile and compact 40mm twin-sheave pulley block from the Ronstan Series 40

and gap-filling formula

Self-priming piston pump design

Adjustable throttle friction and positive shift detents for refined control feel

rust staining and waterline buildup are constant issues due to saltwater exposure and harsh UV conditions

Featuring a robust fold-down base

Watertight o-ring seal for dry compartment access

Suitable for marine communication systems

Sheave diameter: 40 mm (1 9/16 in)

Application: Brush or cloth

Supplied by Barton Marine NZ – marine hatch experts