The 16 mm Harken Air Block is Harken’s® smallest block. It is perfect for small control lines found on high-tech boats. The patented bearing system uses stainless steel balls in a captive grooved race and has a 250 lb (113 kg) maximum working load.
This version uses the same technology as the 404 16mm block but has two connected to allow a smooth exit for your ropes. It is designed to be mounted into the deck on your boat.