ZKTOOL 11PC Compression Tester, Automotive Engine Compression Tester Adapter Kit, Engine Cylinder Leak Down Compression Test Motor Pressure Gauge. (All Vehicles).
- ...one-way valve with pressure holding function ensures that the pressure gauge obtains the maximum pressure at the spark plug during the compression process..
- Service: If there is anything about this product that makes you unsatisfied, we provide warranty, return and exchange service, and the package contains detailed operating instructions..