Keep your spray guns running effectively by using the DeVilbiss HAV-511 High Output Air Adjusting Valve with Gauge. This air regulator will allow you to have precise air control at the gun for best, consistent results. Includes markings for the optimal operating range for the Devilbiss GTI Millennium, and GFG Plus Guns. It fits any professional spray gun. This regulator has reads up to 160 PSI. It has a 1/4" NPS (M) Inlet and a 1/4" NPS (F) swivel Outlet.