The 3M™ Performance Air Flow Control Valve features a clear, easy-to-read gauge, single-knob operation, and secure fittings. It can also be used on many non-3M spray guns and air tools which require adjustable air pressure. As a flow regulator, it is designed for improved air flow performance which helps reduce system pressure losses. Its high-contrast analog pressure gauge and textured control knob helps painters dial in the price pressure to optimize their work — helping reduce overspray and material consumption. The gauge is clearly marked at 20 psi (1.4 bar) and 29 psi (2.0 bar), the standard pressures for 3M™ Performance Spray Gun HVLP and Fine Finish nozzles respectively. Designed for industrial / professional use with 3M™ Performance Spray Gun, and other non-3M spray equipment. Features ¼-inch U Thread connections for broader ¼” thread compatibility.