Quickly refills automotive cooling systems and eliminates trapped air and detects leaks. Universal adapter forms an airtight seal with all radiator and coolant bottle necks. No custom adapters required. Patent Pending Valve Coupler provides multiple test capability and flexibility to access tight areas. All components assemble using quick-connects for safe and easy set up and breakdown. Complete with 2-1/2" vacuum gauge, extension hoses and custom molded case for case for easy storage The MITMV4535 Cooling System AirEvac Kit refills automotive cooling systems in minutes without trapping air that can cause overheating. The kit combines a universal adapter with a compressed-air-operated venturi vacuum to quickly eliminate trapped air by purging and refilling the cooling system under vacuum. Its new innovative design allows improved access into tight areas, and the patent pending valve coupler allows the operator to test the cooling system for leaks prior to refilling. Thumb-operated shuttle valve holds vacuum to perform leak testing and releases vacuum during refill. Venturi vacuum purges all air from the cooling system. Universal adapter forms airtight seal with all types of radiator and coolant bottles. Venturi vacuum purges all air from the cooling system. Large, durable vacuum gauge with protective rubber boot. Patent pending valve coupler provides multiple test capability and flexibility to access tight areas. Kit Includes: 2-1/2" (65 mm) diameter diaphragm style vacuum gauge . Compressed-air-operated Venturi Vacuum . Valve Coupler . Universal Cooling System Adapter . (2x) 30" (760 mm) Extension Hose . 5' (1.5 m) Coolant Refill Hose . Custom Molded Case . User's Manual