Barrow G1/4 - 16mm OD Twin Seal Hard Tube Compression Fitting - Black

These fittings are very well made, they have good, pliable sealing O rings, 2 of which prefitted inside the fitting, you also get 2 O rings in the packet, one of which is used before you screw the cap on the fitting, leaving 1 spare O ring. They also have an 8mm Hex recess in the base to tighten/loosen to the block/pump/etc... They seal very well with 3 O rings overall in each fitting and look good with minimal branding, unlike other makes.Im impressed with these fittings, and although they are cheaper than others, dont let that put you off them, they are of very high quality, and as a bonus, they come in multiple colours.