Quickly and easily allows you to check pressure caps and cooling systems. The easy-to-read pressure gauge tells in seconds if the cap is in good condition and whether the cooling system leaks. The gauge allows testing from 1 to 30 pounds pressure. The pump action is much faster and easier to operate than a bulb-type tester. Kit includes adaptor for testing « a » caps, spacer for 1″ deep filler necks and the 2-11/16″ cap adaptor. Can be used with ZTSE2384.