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

Its the perfect solution for take up systems within beams or other areas where space is tight. Or use them as fairleads in order to redirect control lines so that they are at your fingertips for efficient adjustment.

  • Sheave Ø (mm) – 16 mm
  • Length (mm) – 29 mm
  • Weight (g) – 10 g
  • Maximum line Ø (mm) – 5 mm
  • Maximum working load (kg) – 113 kg
  • Breaking load (kg) – 544 kg