Adjustable Back Pressure Relief Valve, Body Material Polypropylene, Inlet Type FNPT, Outlet Type FNPT, Inlet Size 1 in, Outlet Size 1 in, Factory Set Pressure 150 psi, Pressure Range 5 to 100 psi, Not Applicable BtuH, Overall Height 9 13/16 in, Overall Length 3 in, Seat Material FKM, Spring Material Plated Steel, Temp. Range 32 Degrees to 180 Degrees F, Test Lever Test Lever Not Included, Standards ISO 9001:2015