Filter-Regulator Filter Bowl Material Polycarbonate Air Inlet Size 1/4 in Air Inlet Type NPT Maximum Flow Rate 20 cfm Filter Rating 40 micron Filter Type Particulate Maximum Operating Pressure 145 psi Drain Type Semi-Automatic Pressure Gauge Included No Body Material Aluminum Overall Width 1 9/16 in Series Light Duty Adjustment Location Top Adjustment Mechanism Knob Adjustment Mechanism Material Acetal Air Flow Direction Left to Right Air Inlet Gender Female