Harken 29mm Carbo Air Block w/Swivel

The Harken 29mm Carbo Air Block with Swivel is a purpose-built rigging block engineered for applications demanding low-friction load management and repeatable performance. Originally developed for maritime and outdoor rigging environments, this compact block has earned adoption in tactical, rescue, and expeditionary settings where operators require reliable mechanical advantage systems that remain lightweight yet robust. The 29mm Carbo Air design delivers the strength-to-weight ratio critical for field operations where load capacity cannot be compromised by excessive gear weight.

The block features Harken's proven Carbo Air technology—a low-friction compound pulley system that reduces mechanical drag while maintaining high working loads appropriate for tactical rigging, anchor points, and load-bearing applications. The integrated swivel eliminates line twist and binding, a critical feature when operating under dynamic or sustained tension. Measuring 2 x 1 x 4 inches and weighing just 0.1 pounds, this block maintains portability without sacrificing the engineering that makes it reliable under field conditions. The aluminum and composite construction resists corrosion while remaining maintenance-friendly in austere environments.

Operators in rescue, rappelling, and tactical rope systems benefit most from this block's proven performance characteristics. The swivel design is particularly valuable in high-angle rescue, HALO insertions, and multi-point rigging where line rotation creates operational hazards or reduces system efficiency. Installation requires compatible 29mm rigging lines and appropriate anchor points rated for the load class. Those building custom rigging systems, fortification anchor arrays, or emergency extraction kits will find this block integrates seamlessly into existing Harken ecosystem components.