very good universal and practical set for a car repair shop! Suitable for testing the cooling system of gasoline and diesel engines. Contains four cone caps with dimensions 17-24 mm. 28-31.5 mm. 37-39.5 mm. 47-48.5 mm. In addition to the cones, the set includes a hand pump for pressurization with a measuring pressure gauge 0-2.5 bar. In a plastic case.