Durable metal pump with quick coupler and rubber cover for a secure grip and longlasting performance. Pressure range: 035 psi / 02.5 bar. Suitable for most vehicles, with a compact design that is easy to store and carry. This radiator pressure tester tool kit can change the coolant and test for leaks in the vehicle's cooling system, including the radiator, heater core and radiator cover, in a simple and direct way. and . Use scenarios Coolant replacement: use the kit to pressurize the cooling system after draining and refilling to help identify leaks around the radiator, hoses and connections during coolant changes. Leak diagnosis after : after servicing the radiator, heater core, or related components, perform a pressure test to confirm there are no leaks before completing maintenance. Seasonal check and preventive maintenance: periodically test the cooling system pressure to verify integrity before long trips or extreme weather conditions, helping prevent overheating or sudden leaks.