Buyers Products Pressure Regulator Has A Locking Knob And Is Rated To 300 Psi Inlet Pressure. Each Regulator Includes Two 1/8 In. Nptf Work Ports, Two 1/8 In. Gauge Ports, And Two Plugs. The Relieving Type Regulator Has A Range Of 2-160 Psi And Compares To Parker?? Branded Regulator #14R013Fc With #P01531 Nut.