Filter-Regulator Filter Bowl Material Zinc Air Inlet Size 1/2 in Air Inlet Type NPT Maximum Flow Rate 90 cfm Filter Rating 5 micron Filter Type Particulate Maximum Operating Pressure 250 psi Drain Type Automatic Pressure Gauge Included Yes Body Material Zinc Overall Width 3 1/4 in Series 07E Adjustment Mechanism Knob Adjustment Mechanism Material Plastic Air Outlet Size 1/2 in Air Outlet Type NPT Differential Pressure Indicator Included Yes Drain Included Yes