Quiksilver ultraflo Hi-pressure (automatic) safety couplers, delivers high air volume with low pressure drop. Colour coded green rings. Female thread, 3/8 connection NPT, max 500 PSI, temp range: -20 degree C to 100 degree C, air flow: 70 SCFM @ 100 PSIG inlet with 10 PSIG pressure drop. All metal heavy-duty drag guard protects against accidental disconnection. Accepts 1/4 industrial interchange plugs. Automatic push-to-connect operation, easy to connect even under pressure and ball-locking mech