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The Performance Tool W89729 Leak Down Test Kit can quickly diagnose internal engine problems such as bad rings, valves and leaking head gaskets. The Kit includes: 10 millimeters and 14 millimeters thread adapters, dual 2-1/2 inch chrome bezel gauges and rugged protective outer shell, pressure regulated manifold with quick couplers and all comes with an easy-to-open Blow molded hard case for storage. Please note this item not a compression tester! If you are looking for a standard compression tester kit please look at our W80584 (ASIN: B00SDFY9HE) and for diesel compression Tester please look our W89729 (ASIN: B00EDEEHRG)