Ronstan RF20100 20mm Single Swivel Pulley | Sailing Block NZ

The Ronstan RF20100 Series 20 block is a compact, high-performance 20mm single swivel pulley designed for demanding sailing applications. Featuring stainless steel ball bearings, a UV-resistant acetal sheave, and a swivel shackle, this block is built for low-friction control in any rigging setup.

Ideal for dinghies, small keelboats, and performance sailing, the RF20100 is commonly used in cunningham systems, vangs, travellers, and other control lines. Lightweight, strong, and corrosion-resistant, it’s a favourite among competitive sailors and cruisers alike.

✅ Key Features

• Ronstan RF20100 – Series 20 single swivel block

• 20mm acetal sheave with ball bearing system

• Swivel head for easy rigging and movement

• 316 stainless steel cheeks for marine durability

• Perfect for vang, cunningham, traveller, and control lines

• Smooth, low-friction performance under load

• Compact and lightweight for small boats

• Trusted sailing hardware made for New Zealand conditions