Tightly closed cap, Fully Tig Welded and Thread Come with O-ring Gasket, Keep a good closed environment and Prevent coolant leakage.Number of aluminum punches, inner diameter, 36 mm, wall thickness, 3 mm.When the coolant pressure in the radiator exceeds the pressure cap setting, the coolant is sealed through the pressure cap and flows through the overflow tube into the radiator coolant overflow tank.Universal fitment, suitable to most vehicles. Fit For Most Car: For etcWidth: 170mm Incl. FlangeHeight: 245mm Incl. CapDepth: 85mmInlet/Outlet Size: 12mmThread Size: -6Capacity: 2000ml (2L)Colour: silverMaterial: aluminum alloyPackage Contents:1 * Cooling potOnly the above package content, other are not included.Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.