Valve, Safety, Flow Range 0-6 GPM, Pressure Range 1000 to 4000 PSI, Max. Fluid Temp. 200 F, Body Material Brass, Wetted Materials Brass, 400 Stainless Steel, Delrin, Inlet Port (In.) 3/8 M, Max. Pressure 4000 PSI, Height 2 In., For Use With Plunger Pumps