•Quick method to obtain cylinder compression pressure on engines with deep, recessed spark plugs and difficult access.
•Gauge assembly includes pressure relief valve.
•A special air-hold valve is included for easy resetting of the gauge, graduated from 10 to 300 PSI (0 to 21 kg/cm²).

•Quick method to obtain cylinder compression pressure on engines with deep, recessed spark plugs and difficult access.
•Gauge assembly includes pressure relief valve.
•A special air-hold valve is included for easy resetting of the gauge, graduated from 10 to 300 PSI (0 to 21 kg/cm²).