Adjustable Relief Valve, Body Material Bronze, Inlet Type FNPT, Outlet Type MNPT, Inlet Size 3/4 in, Outlet Size 3/4 in, Factory Set Pressure 225 psi, Disc Material Bronze, Overall Height 6 1/8 in, Application Overpressure relief and protection of pumps, tanks, linesand hydraulic systems, pressure regulationand continuous by-pass relief, Overall Length 3 in, Spring Material 316 Stainless Steel, Temp. Range -60 Degrees to 406 Degrees F, Test Lever Test Lever Not Included