Mastercool 43014 Vacuum-type Cooling System Filler KitRefill new coolant by creating a vacuum in the cooling systemNo need to undergo time-consuming air bleeding after refilling new coolantConical adapter offers a wide variety of applications for different radiator filler necksMinimizes the risk of engine overheatingFor passenger and heavy duty vehiclesKit Includes:Vacuum Gauge (43013-001-G): 0 – 30 inHgShop air connector: Connect to create vacuumAir Valve: To control air flowVenturi Style Vacuum: To connect with an air compressor to create vacuumConical Adapter: To connect to radiator or expansion tankCoolant Hose with Connector and Coolant Valve: To add new coolant. Turn coolant valve to pull new coolant into system – 51” longDrain Hose: For draining residual fluid in the radiator and the tool