Highly polished stainless steel radiator cap. The cap is 60mm diameter and has an inner reach (top seal to bottom seal) of approximately 24mm, the standard for most classic cars. Choose the pressure ratings from the drop down menu: 4lbs, 7lbs, 15lbs or 20lbs per sq. inch. (Approx. 27kPa, 48kPa, 103kPa, or 138kPa)
