Keeping you Ready for the Road Ahead , the Gates 31350 Heavy Duty Cool Control Radiator Cap is built to endure with its corrosion-resistant, heavy gauge metal. With exact pressure control, no adjustment is necessary for installation. Experience the benefits of both long service life and accurate pressure control, while covering a wide range of pressures. This heavy duty radiator cap is designed to raise the radiator fluid’s boiling point in order to prevent premature boiling and overheating in your heavy duty cooling systems, maintaining your active road time. FleetPride is your First Click in Heavy Duty .