Using pressure to find leaks is one of the quickest ways to diagnose cooling system faults. Finding one tool to fit a wide range of vehicles can be difficult. This cooling system pressure tester features an expandable seal that fits most vehicle radiators. Seal expands from 3/4in. to over 2in. to fit virtually every automotive and light truck application. Attached hand operated pump makes it easy to inflate bladder, attachment hoses, pump and lid assembly, and complete instructions in a durable molded case. Made in Australia.