Our Coolant Refill Tool with Vacuum Creation offers quick, air-bleed-free coolant replacement with a versatile adapter and convenient chain hook. Vacuum Refill Efficiently refills new coolant by creating a vacuum in the cooling system. TimeSaving Eliminates the need for timeconsuming air bleeding after refilling. Wide Compatibility Coneshaped adapter fits various radiator filler necks. Convenient Design Chain can be hooked under the vehicles hood for easy operation and storage.