16mm Block. 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. The 404 uses an O-ring to keep the line in the sheave during intermittent loading.

Sheave O (mm) 16 mm

Sheave O (in) 5/8 in

Maximum line O (mm) 5 mm
Maximum line O (in) 7/32 in

Maximum working load (kg) 113 kg

Maximum working load (lb) 250 lb