Description
The Performance Tool Flex Drive Compression Tester measures cylinder compression up to 300 PSI by threading into spark plug holes. Flexible rubber hose lets you reach cylinders in confined areas. Checks cylinder compression from 0-300 PSI (0-21gm/cm2) Fits 14mm and 18mm spark plug threads Equipped with air-hold valve and gauge reset button 11in. flexible rubber hose Complete instructions Model Number: W80579. Age Group: adult.