Harken 40mm Carbo Air Double Fixed Block w/Becket

The Harken 40mm Carbo Air Double Fixed Block with Becket is a premium sailing block engineered for crew and cruising applications where reliable load management and durability are essential. This fixed block features a becket attachment point, making it ideal for mainsheet, jib sheet, and general rigging systems aboard cruising sailboats and larger vessels. The double pulley configuration distributes loads evenly across two sheaves, reducing strain on halyards and control lines while enabling efficient purchase ratios in demanding marine environments.

Built with Harken's Carbo Air composite construction, this 40mm block combines lightweight performance with exceptional strength-to-weight ratio—critical for modern sailing rigs where weight aloft affects stability and handling. The fixed pulley design eliminates moving parts that could corrode or jam in saltwater conditions, ensuring consistent performance across extended cruising seasons. The integrated becket allows direct attachment to boom gallows, eyebolts, or deck hardware without additional fittings, streamlining installation and reducing rigging complexity. Weighing just 0.2 lbs, the compact 3 x 1 x 5-inch profile fits tight spaces while maintaining substantial load capacity typical of Harken's professional-grade blocks.

Cruising sailors, racing crews, and maritime professionals rely on this block for mainsheet traveler systems, boom vang arrangements, and multi-purchase control lines where cleanliness and reliability outweigh the complexity of swivel designs. The fixed configuration performs optimally when installed on stable attachment points and works seamlessly with standard 5/16-inch or 3/8-inch line depending on your rigging setup. Harken's reputation for engineering precision ensures this block meets the demands of both coastal daysails and offshore passages, making it an essential component for anyone prioritizing safety and longevity in their sailing hardware.