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

Warning: This product may expose you to chemicals including lead which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov