Uses shop-air to quickly evacuate air from an empty automotive cooling system for vacuum leak testing Quickly refills cooling system in without trapping air that can cause overheating Universal cooling system adapter replaces more than 20 individual adapters for cars, vans, light- and heavy-duty trucks Components connect using self-locking quick-disconnects for easy and time saving assembly and breakdown Patent-pending adapter cam mechanism ensures an air-tight seal with radiator and coolant bottle necks Packaged in durable custom-molded case Includes: Universal cooling system adapter with diaphragm gauge, brass flow control valve, and quick connect coupler Venturi vacuum generator with muffler Coolant refill hose with inlet screen Custom-molded case User manual (English, Spanish, French) Mityvac MV4533 Cooling System Air Evacuator Kit