Ronstan RF25209 Double Lashing Block 20mm – Ball Bearing PulleyEnhance your sailing performance with the Ronstan RF25209 Double Lashing Block 20mma lightweight, high efficiency double sheave pulley designed for modern control line systems. Part of Ronstans advanced Series 20 range, this block features dual 20mm acetal sheaves with a 2 stage ball bearing system, delivering exceptionally low friction and smooth operation under both dynamic and static loads. Engineered for performance sailing, the RF25209 offers an

the RF243 provides excellent corrosion resistance and long-term durability

core‑to‑core

Featuring the innovative QuickTrim™ self-tailer

Fitted with a solid rubber wheel on a Nylon hub

this block accommodates rope diameters up to 8mm and wire up to 4mm

develop sharp wire strands

Manufactured from closed-cell EVA foam

Product Type: Triple lashing block / pulley

High-torque 12V DC motor for powerful anchor retrieval

Ocean Tech 20A Electronic Digital Level Switch

Robust marine-grade construction built for saltwater environments

this anchor delivers deep penetration and strong grip—perfect for coastal cruising