Adjustable Back Pressure Relief Valve, Body Material Bronze, Inlet Type FNPT, Outlet Type FNPT, Inlet Size 3/8 in, Outlet Size 3/8 in, Factory Set Pressure 500 psi, Disc Material Stainless Steel, Overall Height 5 1/4 in, Application Pump systems, hydraulic systems, oil burningequipment, rams, presses and lifts, chemicalsprocesses, waste treatment, desalination andcar washes, Overall Length 1 1/4 in, Seat Material Bronze, Spring Material Stainless Steel, Temp. Range -20 Degrees to 400 Degrees F