OEMTOOLS 24444 Cooling System Refiller Kit Quickly Refills Cooling System and Eliminates Trapped Air Performs Vacuum Leak Tests on the Cooling System Helps Prevent Comebacks and the Threat of Engine Damage Five Additional Bushings and Tapered Cone Adapter to Cover Most Vehicle Cooling Systems Universal Adapter Forms An Airtight Seal With Most Radiator and Coolant Bottle Necks. No Custom Adapters Required