Ronstan RF20212 Double Block with Becket 20mm – Series 20 Ball Bearing PulleyThe Ronstan RF20212 Double Ball Bearing Pulley with Becket (20mm) is a compact, high performance Series 20 block designed for efficient purchase systems on modern sailing boats. Featuring two 20mm acetal sheaves running on precision stainless steel ball bearings, this block delivers smooth, low friction operation under both dynamic and static loads, making it ideal for frequently adjusted control lines. The integrated becket provides a fixed tie off

Use Case: Marine

Compact and reliable – suitable for yachts and cruisers

efficient operation and exceptional durability in demanding marine environments

ideal for light-duty rigging tasks on dinghies

Max line diameter: 5mm

Integrated becket for line tie-off or purchase system

Easy Installation – Fits most common marine rail sizes

Ideal for use where space is tight and rigging needs to stay streamlined and efficient

lightweight and easy to deploy

Suitable for structural and load-bearing applications

House battery charging

Featuring a medium-scale 1:200