Ronstan Series 15 Ball Bearing Double Block, Loop Head – 15mm, 240kg SWL

Master precise sail control in the most demanding marine environments with the Ronstan Series 15 Ball Bearing Double Block. Engineered for efficiency and durability, this ultra-lightweight block provides exceptional performance and ultra-low friction, making it the international choice for competitive sailing in dinghies, skiffs, and sports boats. Upgrade your rigging with Ronstan’s trusted performance today.

Key Benefits & Specifications:

• Smallest and Lightest: Optimizes weight for competitive sailing and high-performance applications, contributing to enhanced speed and agility.
• Ultra-Low Friction System: Precision-molded, UV-stabilized acetal sheaves run on stainless steel ball bearings, ensuring smooth, responsive line control and high performance.
• Superior Durability: Cheeks constructed from marine-grade 316 stainless steel provide exceptional strength and corrosion resistance in harsh saltwater conditions.
• Versatile Loop Head: The double loop head design offers flexible attachment options, ideal for splicing, lashing with rope or soft shackles, reducing overall metal hardware weight.
• Compact Sheave Diameter: Features a 15mm (5/8") sheave, providing a compact size for precise control and minimal interference on deck.
• Optimized Line Capacity: Accommodates a maximum line size of 5mm (3/16"), suitable for a wide range of dinghy and small boat control lines.
• Robust Load Capacity: Offers a Safe Working Load (SWL) of 240kg (530 lbs) and a Breaking Load (BL) of 700kg (1540 lbs), ensuring reliable performance for critical systems.
• Featherlight Design: Weighs only 23g (0.8 oz), contributing to overall vessel lightness for enhanced speed and agility.

Compatibility & Pairings:

Ideal for dinghy control lines, vangs, cunninghams, tweakers, shock cord tensioning systems, and small purchase systems on dinghies and OTB catamarans.