Universal Cooling System Test Kit The MV4534 is a professional-grade, automotive cooling system test kit . The kit combines a high-quality pressure pump with Mityvac’s universal cooling system adapter for quick, efficient and accurate testing, without the need for costly application-specific adapters . High-volume hand-operated pump builds pressure quickly to locate leaks . Universal cooling system adapter replaces more than 20 individual adapters for cars, vans, light- and heavy-duty trucks . Patent-pending adapter cam mechanism ensures an air-tight seal with radiator and coolant bottlenecks . Compact one-piece adapter design fits conveniently in tool box . Large, easy-to-read 2.5” diameter gauge includes clearly indicated pressure test zones . Convenient push-button valve safely relieves pressure when testing is complete . Packaged in durable custom-molded case . Includes: . Hand Pressure Pump with 2.5” Diameter Gauge and Push-Button Pressure Release Valve . Universal Radiator Test Adapter MV4534