Professional Engine Cylinder Gauge Diagnostic Tool Quickly and accurately test the compression in the engine at high pressure. Essence. Trigger button on the side of the tester's camera. Works on conventional, electronic, domestic computerized and imported vehicles. It is a diagnostic tool that can help you solve the problem. Identify damaged pistons, worn rings, burnt valves and blown head gaskets. Features: Materials: Metal and rubber. Color: Black. Dimensions Product dimensions (L x W x H): 122 x 77 x 33mm. Special function: Fast and accurate readings: Unit test/mode: Bar, PSI. Pressure gauge diameter: 75mm. Approximate hose length: 42cm. Contents: 1 Cylinder compression tester. 1 M10 x 1.0 adapter. 1 M12 x 1.25 adapter. 1 M14 adapter x 1.25. 1 M18 x 1.5 Adapter. 1 straight line pressure hose nozzle. 1 angled nozzle for pressure hose. 1 hose. 1 carrying bag.