Booster Regulator Air Inlet Size 1/2 in Air Inlet Type NPT Maximum Flow Rate 67.1 scfm Maximum Operating Pressure 145 psi Maximum Operating Temperature 122 Degrees F Pressure Boost Ratio 2 Includes Pressure Gauge Silencer Air Outlet Size 1/2 in Air Outlet Type NPT Material Carbon Steel Minimum Operating Pressure 29 psi Minimum Operating Temperature 35 Degrees F Pressure Gauge Port Size 1/2