Description Radiator caps make an excellent replacement for worn or faulty radiator caps, which occur over time. Radiator caps are easy to install and remove because the cap’s shell turns independently of the sealing gasket, stem, and bottom plate. Cap Depth (IN) 1.4 Coolant Recovery System Open, Closed System Material Stainless Steel, Rubber Pressure Rating 4 PSI Pressure Rating (psi) 4 lb Quick Pressure Release No SAE Pressure Range 3-5 PSI SAE Pressure Range (psi) 3-5 Valve OD 1.54 in Width 2.22 IN Reference Numbers 850798, 17005