Oxygen (or other gases) fill whip. This is setup with a CGA-540 nut/nipple to connect to an oxygen bottle (not scuba tank)... used for partial pressure blending or 100% fills. Whip can easily be converted to another CGA fitting by swapping out the nut/nipple to the appropriate size. The other end has a line valve, bleeder screw, 4000psi gauge and DIN scuba cylinder valve connection. Perfect for the home blender! *this has not been recently 02 cleaned*
