This is a brand new Parker R75-02A regulator from the QUBE 75 series, made in the United States. The port diameter is 1/4 in, and it has a maximum pressure of 300 psi. The item is listed by Hazem, and the unit type is a unit. It also comes with a California Prop 65 Warning for attention to CA residents. This regulator is perfect for use in compressed air treatment, hydraulics, pneumatics, pumps & plumbing, and industrial settings.