Check the leakage of original radiator cap and cooling system Easy reading 2" diameter pressure gauge with dual scale reading of -76~0 cmHg and -1~0 bar Vacuum leakage test for easy identification and prevent coolant spillage and wastage Eliminates the introduction of bubbles and airlock into cooling system and deduct the time for refilling coolant Kit includes a pressure gauge, connector, universal rubber cone-shape adapter, cooling hose and air bleeding hose Applications: Almost all type of vehicles