Multi-Purpose Leak Detection and Coolant Refill The 28-piece Universal Radiator Pressure Tester and Vacuum Cooling System Kit simplifies leak detection, coolant replacement, system refilling, and air pocket removal. This all-in-one set provides everything you need for efficient vehicle maintenance. Quick Cap Identification with Color Coding Includes 17 color-coded radiator test caps for quick, correct cap selection. The color coding speeds setup and reduces trial and error during testing. Wide Vehicle Compatibility Compatible with most domestic and imported vehicles. The tester operates from 0 to 35 PSI, suitable for a broad range of cars and trucks. Complete 28-Piece Set Contains 28 high-quality components, including durable nylon caps, corrosion-resistant copper connectors, a clear pressure gauge, and premium rubber and metal adapters. All parts store neatly in a sturdy red case for easy storage, use, and transport. Practical applications - During coolant service on a car or light truck, detect leaks, purge air pockets, and refill the cooling system efficiently. - In a shop or mobile service, quickly identify the correct cap and test multiple vehicles with the color-coded caps for faster workflow. - After repairing a cooling system, perform a pressure test within 0-35 PSI to verify integrity before final refilling.