Harken 404 16 mm Fixed Single Airblock (HA0404) -

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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) safe working load - the highest on the market compared to similarly sized blocks.

The 442 uses a spacer and the 404 uses an )-ring to keep the line in the sheave during intermittent loading.

Use for:
Dinghy control lines
Big Boat leech lines
Downhauls
Traveler controls
Spinnaker pole trip lines
Outhauls
Cunninghams
Halyards on prams

NB. Shackle pin diameter 4mm