Ronstan RF572 – 25mm Series 25 Utility Block with Becket and Loop HeadThe Ronstan RF572 Series 25 Utility Block is a lightweight, durable, and economical solution for various sailing applications. Featuring a 25mm sheave, stainless steel cheeks, and UV stabilised acetal sheaves, it ensures long service life with virtually no maintenance required. Ideal for vang, cunningham, and trapeze retriever systems on dinghies, as well as leech line tackles and bunk adjusters on larger yachts. The loop head design allows for easy

✅ Fold-down base for compact storage and clearance

making it ideal for halyards

It suits 60mm diameter masts and is very popular amongst Laser sailors

Feature superior Viton O-ring seals for leak free connection with varying fuel blends

paired with exceptional strength and efficiency

Ideal for control lines accommodating rope diameters from 3mm to 6mm

grease-free surfaces

Material: Durable polyester outer

and trimming lines

The Dickinson DP Cap provides:

Durable and CE-certified

or cabin tops