Check the listing for details. TU-21 Cylinder Leak Down Tester Kit Engine Compression Test for Car Motorcycle. Condition: New, Made in China. Listed at 47.20 USD. Cylinder Leak Tester Kit:This compression test kit is designed to detect a variety of common engine faults. It can directly display the pressure value and leakage rate of the tested cylinder Cylinder Dual Gauge Leak Tester Kit Versatility. Suitable for any gasoline engine with 10, 12 or 14 mm spark plugs. Ideal tool for motorcycles, trucks and cars. Function of Cylinder Leakage Tester Kit: Used in automobiles to detect engine faults such as worn piston rings, cracked cylinder heads, worn valves and cracked head gaskets. Measuring range: clear dial, very easy to read the scale, one reads the going in pressure and the other is used to measure the leakage pressure, measuring range is 0-100 psi / 0-7 bar and 0-100% (Accuracy: ±0.5%)