The Dye Light Diagnostic Leak Detection System is a specialized tool used in gas engine oil systems, Automatic transmission systems and Coolant systems to detect leaks efficiently. With its dye light technology, this system helps professionals easily identify leaks by highlighting them with a distinctive dye. This innovative solution provides a quick and accurate way to locate leaks. Making it a valuable asset for looking to improve their leak detection process. Box has a little wear and discoloration. See pictures.