1x Extension Tube Bar. 1x Hose With Tension Bar. Motors drive the engine to rotate at 100-150R/MIN speeds for 3-5 seconds. Make the throttle fully opened and press the connection of the pressure gauge on the spark cold hole;.
This product would be ideal for automotive repair shops, auto enthusiasts, and mechanics who need a reliable method to check the compression of gasoline engines between 0-20 bar (0-300 psi).
