TCP Global Brand Air Adjusting Valve Regulator with Gauge for Spray Guns and Pnuematic Tools (1/4"NPT) Use to keep your spray guns running effectively! Allows you to have precise air control at the gun for the best and consistent results It fits any professional spray gun. Reads up to 180 PSI and has a bar level up to 12. This regulator has a 1/4" NPS (M) Inlet and a 1/4" NPS (F) swivel Outlet.