Harken 2639 Carbo Air Double Swivel Block w/Becket, 970 lb Max Load

Experience lightweight strength and exceptional reliability with the Harken 2639 Carbo Air Double Swivel Block. Engineered for optimal performance, these low-friction blocks are lightweight, strong, and reliable, making them an affordable choice for sailors. They boast significantly higher working loads and are up to 30% lighter than Harken's Classic blocks, ensuring safe and easy trimming across various sailing applications. Upgrade your rigging with Harken's trusted performance today.

• Optimized Sheave Diameter: Features a 40mm (1 9/16 inch) sheave, providing an ideal balance for common sailing lines and efficient power transfer.
• Versatile Line Compatibility: Accommodates lines up to 10mm (3/8 inch) in diameter, offering flexibility for a wide range of rigging needs.
• Exceptional Working Load: Boasts a maximum working load of 440 kg (970 lb), ensuring superior strength and safety for demanding loads.
• Enhanced Rigging Versatility: Double swivel design with an integrated becket provides versatile rigging options and helps prevent line twisting.
• Low-Friction Efficiency: Sheaves spin on high-load ball bearings with fitted races, enabling smooth, efficient trimming and release under pressure.
• Durable, Lightweight Construction: Features nylon-resin sideplates densely packed with long-glass fibers, offering a compact block with a high strength-to-weight ratio. Ball bearings, sheave, and sideplates are UV-stabilized with carbon black for maximum protection and longevity.

Perfect for main, jib, and spinnaker sheets on dinghies and sportboats, as well as various control lines on boats of all sizes.