Phobya 19/13mm (1/2-3/4") Compression Fitting Straight G1/4 - Black Nickel Plated

The answer to all barbed fittings!
Finally no barbed fittings are required for a Highflow system and the
highest possible safety can be ensure with this compression fitting. the
special short thread also allows application of this fitting on
waterblocks which usually require a spacer ring for fitting
installation. The hose end is simply pushed onto the fitting and fixated
and securely sealed by the union nut, resulting in an absolutely tight
seal. The integrated O-ring additionally ensures a tight seal with the
waterblock. No tools are needed for installation, just tighten by hand
and you are all set to go - That's how easy fitting installation can be!