Filter-Regulator Filter Bowl Material Metal Air Inlet Size 3/8 in Air Inlet Type NPT Maximum Flow Rate 158 cfm Filter Rating 5 micron Filter Type Particulate Maximum Operating Pressure 250 psi Drain Type Manual Pressure Gauge Included No Body Material Aluminum Overall Width 2 3/8 in Series B18 Adjustment Mechanism Knob Adjustment Mechanism Material Acetal Air Outlet Size 3/8 in Air Outlet Type NPT Differential Pressure Indicator Included Yes Drain Included Yes