Harken 16mm Double Block

The Harken 16mm Double Block is the smallest block in Harken's lineup, engineered specifically for high-tech dinghies and small-craft applications where precise load management and compact design are critical. This marine-grade pulley system delivers reliable mechanical advantage in tight spaces where conventional blocks cannot fit, making it the go-to choice for sailors and water sports operators who demand engineered performance in confined rigging scenarios.

At the core of this block's performance is Harken's patented bearing system, which uses stainless steel balls held in a captive grooved race to eliminate friction and extend service life in marine environments. The 16mm sheave accepts line up to 5mm diameter and can handle a maximum working load of 204 kg (450 lbs), with a breaking load rated at 544 kg (1,200 lbs)—providing significant safety margin for dynamic load scenarios. Weighing only 1.1 lbs with compact dimensions of 2 x 2 x 5 inches, the block maintains structural integrity while keeping overall rig weight minimal, a critical consideration in dinghy racing and offshore operations where weight distribution directly affects handling.

This double block is built for sailors, race crew, and marine professionals who operate small synthetic control lines on modern racing dinghies, catamarans, and offshore vessels. The stainless steel construction resists corrosion from salt spray and UV exposure, making it suitable for extended saltwater use without maintenance-intensive coatings. Whether you're tuning jib leads, managing control-line systems, or rigging compact sail plans, the 16mm Double Block provides the precision and durability required in high-performance marine environments where equipment failure is not an option.