Features: Identifies bad valves, worn rings, cracked cylinder walls and blown gasketsCompatible with standard leakage testersFits almost all engines with combination 14 mm and 18 mm adapter unit Description: Cylinder leakage testing is the method professional mechanics have used for years to more accurately pinpoint the causes of low compression. Easy to use, and works with ship air quickly spotting bad valves, worn rings, cracked cylinder walls and blown gaskets. Compatible with standard leakage testers. With combination 14 mm and 18 mm adapter unit, this leakage tester will fit almost all engines. About Milton® Industries Inc.:This is an authentic Milton® Industrials product shipped new in packaging (NIB). Many of our products are manufactured and shipped directly from our corporate headquarters in Chicago, IL 60639, United States. For the past 70 years, Milton® Industrials Inc. has been the product of choice when it comes to pneumatic accessories. We have invented numerous industry standard products, including the classic M STYLE® ?I/M? KWIK-CHANGE® Coupler and Plug, Window Inflator Gauge, Safety Blow Guns, and the iconic Driveway Signal chimes and bell. With these inventions, our portfolio has grown to over 1400 different SKU?s.