Filter/Regulator Filter Bowl Material Aluminum Air Inlet Size 1/2 in Air Inlet Type NPT Maximum Flow Rate 164 scfm Filter Rating 5 micron Filter Type Particulate Maximum Operating Pressure 250 psig Drain Type Automatic Pressure Gauge Included Yes Body Material Aluminum Overall Width 2 3/8 in Series 18 Adjustment Mechanism Knob Adjustment Mechanism Material Acetal Air Outlet Size 1/2 in Air Outlet Type NPT Drain Included Yes Drain Part Compatibility GRP-96-637