Adjustable Back Pressure Relief Valve, Body Material PVC, Inlet Type FNPT, Outlet Type FNPT, Inlet Size 1/2 in, Outlet Size 1/2 in, Pressure Range 5 to 100 psi, Overall Height 5 13/16 in, Application Corrosives, Overall Length 2 3/8 in, Seat Material Viton, Spring Material Zinc-Plated Steel, Temp. Range 32 Degrees to 140 Degrees F, Test Lever No