Ronstan Series 40 All Purpose Upright Lead Block, 40mm Sheave

Optimize your marine rigging with the Ronstan Series 40 All Purpose Upright Lead Block. Engineered for superior performance and durability, this low-profile block provides an efficient solution for routing halyards and other critical sail controls, especially in high-load applications on dinghies and small keelboats. Crafted with marine-grade materials, it ensures reliable operation and a long service life. Upgrade your sailboat's control systems today for enhanced responsiveness and sailing efficiency.

Key Features & Benefits:

• High-Strength Construction: Features a Grade 316 stainless steel load housing and fiber-reinforced nylon cheeks to withstand demanding marine environments and high static and dynamic loads.
• Smooth, Reliable Performance: The UV-stabilized acetal sheave runs smoothly on a polished stainless steel race, offering low friction and self-lubricating properties for consistent operation with rope or wire.
• Exceptional Load Capacity: Boasts a Maximum Working Load (MWL) of 400 kg (880 lbs) and a Breaking Load (BL) of 1000 kg (2200 lbs), ensuring security in critical applications.
• Compact & Lightweight Design: With a 40mm (1 9/16 in) sheave diameter and a weight of just 59g (2.1 oz), it offers a minimal footprint and reduces overall rig weight.

Applications:

• Ideal for leading halyards at the mast base.
• Suitable for sheets, halyard tuning systems, backstay systems, and boom vangs on dinghies and smaller keelboats.