Ronstan RF15151 15mm Single Cheek Block – Lightweight Marine Control Block

The Ronstan RF15151 Single Cheek Block features a 15mm sheave and compact profile, making it ideal for low-load applications and tight rigging spaces on dinghies, catamarans, and small keelboats. Designed for performance and reliability, this block is manufactured from UV-stabilised acetal with a 316 stainless steel frame, ensuring strength and long-term resistance in marine environments.

The cheek design allows easy mounting to flat surfaces, making it perfect for control lines, fairleads, or deflecting sheets and halyards on decks and spars. This lightweight, low-friction solution is ideal where space and efficiency are key.

Specifications:

• Sheave Diameter: 15mm

• Max Rope Diameter: 5mm

• Material: UV-stabilised acetal sheave with 316 stainless steel cheeks

• Mounting Type: Cheek-mounted for flat surfaces

• Applications: Dinghy control lines, fairleads, sail control systems

• Features: Lightweight, compact, corrosion-resistant design

Compact, reliable, and easy to install – the RF15151 is available now at Barton Marine NZ, your trusted supplier of Ronstan sailing and rigging hardware.