General Purpose Air Regulator, Pipe Size (Regulators) 1/2 In., Max. Flow (Regulators) 100 cfm, Max. Inlet Pressure (Regulators) 300 psi, Max. Temp. (Regulators) 150 Degrees F, Adjustment Range (Regulators) 0 to 125 psi, Nonrising Locking Adjustment Knob, 1/4 In. NPT Gauge Port, Standard Series, Overall Height (Regulators) 5.90 In., Overall Width (Regulators) 2.90 In.