Ronstan Series 40 Ball Bearing Double Block, Swivel Head – 10mm Max Rope

Elevate your sail control with the Ronstan Series 40 Ball Bearing Double Block. Engineered for high performance and exceptional reliability, this block features an advanced two-stage ball bearing system that delivers ultra-low friction and consistent efficiency across the full load range. Its robust construction, incorporating UV-stabilized materials and stainless steel components, ensures lasting durability in harsh marine environments. Upgrade your rigging today for smoother, more precise sail handling.

• Low-Friction Performance: Utilizes Acetal or Torlon® ball bearings and a two-stage system to provide smooth, efficient operation under all load conditions.
• 360° Swivel Head: The swivel shackle head offers complete freedom of movement, allowing for versatile rigging setups and optimal line alignment.
• Lightweight Construction: Designed to be lightweight at 134g (4.73 oz), minimizing top-weight and contributing to improved boat performance.
• Easy Maintenance: Convenient cheek cut-outs simplify bearing inspection and maintenance, extending the product's service life.
• High Load Capacity: Boasts a Maximum Working Load (MWL) of 500 kg (1102.3 lbs) and a Breaking Load (BL) of 1200 kg (2645.5 lbs), providing exceptional strength and safety for critical rigging points.
• Broad Compatibility: Accommodates up to 10mm (0.39") rope, suitable for mainsail, halyard, vang, and spinnaker control lines on boats up to 8m (26ft).

Ideal for off-the-beach catamarans, one-design classes, and sportsboats requiring efficient and reliable sail control systems.