Material: ALUMINUM Food Height: 9 mm Pressure: 1.3kg/cm Fits to Most Honda / Acura Cars From 1984 - 2021 with Dimension 15mm Please Measurement Your RADIATOR SIZE , Before Purchase This Cap. The Mugen Racing Radiator Cap Performs by Increasing The Pressure Inside the Radiator, Thus raising the coolant boiling point and improving cooling efficiency. The open valve pressure is 1.3 kg/cm compared to the standard 1.1 kg/cm.Radiator cap also engrave 0.9/1.1/1.3, these number show the radiator cap bar. You can use the 0.9 or 1.1 radiator cap in daily life, but if you Want to Enjoy The Speed, you Must Buy The 1.3 bar radiator cap for your car. Fitment Fits Most of Honda / Acura Vehicles Ranging from 1984-2021 Package Includes Radiator Cap X1