Filter Regulator Filter Bowl Material Polycarbonate Air Inlet Size 1/4 in Air Inlet Type NPT Maximum Flow Rate 18 scfm Filter Rating 5 micron Filter Type Particulate Maximum Operating Pressure 150 psig Drain Type Manual Pressure Gauge Included Yes Body Material Zinc Overall Width 1 5/8 in Series 14 Adjustment Mechanism Knob Adjustment Mechanism Material Plastic Air Outlet Size 1/4 in Air Outlet Type NPT Drain Included Yes Filter Bowl Capacity 1 oz