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. 
Part No. 416
 
Sheave Ø (mm) 16 mm
Sheave Ø (in) 5/8 in
Maximum line Ø (mm) 5 mm
Maximum line Ø (in) 7/32 in
Maximum working load (kg) 113 kg
Maximum working load (lb) 250 lb