Draper Expert Universal Cooling System Vacuum Purge and Refill Kit enables a quick and easy way to refill your vehicle's cooling system without the potential for trapped air (creating airlocks). Simply connect the kit to your vehicle's cooling system, create a vacuum, and then release the vacuum to draw coolant back into the system. The kit includes various-sized rubber sleeves to fit most vehicles, a gauge to monitor the vacuum level, and a filter to prevent debris from entering the system.