Harken 29mm Triple Carbo Air Block w/Swivel

The Harken 29mm Triple Carbo Air Block with Swivel is a lightweight, high-efficiency rigging block engineered for marine applications requiring reliable load distribution and smooth operation. Featuring a 29mm sheave and low-friction Carbo Air construction, this block delivers exceptional strength-to-weight performance at an affordable price point, making it a practical choice for trimming operations, sailing systems, and offshore rigging setups where both durability and compact form factor are essential.

The block measures 73mm (2-7/8 inches) in length and weighs only 74 grams (2.6 ounces), making it ideal for installations where weight reduction is critical without sacrificing working load capacity. The 5mm (3/16-inch) shackle pin accommodates up to 8mm (5/16-inch) line diameter, providing versatile compatibility across standard marine rope and cable sizes. The integrated swivel connection eliminates twist and binding during dynamic rigging operations, reducing maintenance requirements and extending service life in high-use environments. The triple-sheave design distributes mechanical advantage efficiently, enabling smoother trimming with reduced crew effort.

This block serves sailors, offshore fishing operators, and marine technicians who demand reliable, compact rigging hardware for both performance cruising and commercial applications. The low-friction Carbo Air construction is proven in salt-air environments where corrosion resistance and minimal maintenance are priorities. Harken's positioning as a manufacturer of premium marine hardware makes this block a trusted option for serious mariners seeking proven engineering at competitive pricing, particularly when weight savings and durability must balance affordability in larger rigging systems.