The Sonic compression tester features a universal quick connect to easily reach sparkplug ports. A quick and easy way to diagnose worn piston rings, burned valves and bad head gaskets. Comes with a case for easy organization and storage. Includes 40 cm (9.44") flexible hose, straight and 45 degree bend 13 cm (5.1") connectors and adapters for use in 10, 12, 14 and 18mm spark plug holes. Has 0-300 PSI pressure range and push button pressure release.