The 16 mm is Harken’s® smallest block. It is perfect for small synthetic control lines found on high-tech dinghies.The patented bearing system uses stainless steel balls in a captive grooved race and has a 250 lb (113 kg) maximum working load. Sheave Ø (mm)16 mm Length (mm)76 mm Weight (g)27 g Maximum line Ø (mm)5 mm Fasteners (mm)4 RH mm Maximum working load (kg)113 kg Breaking load (kg)544 kg