This compression tester kit is an ideal tool for detecting worn piston rings, burnt valves and blown heads gaskets in engines of all types, which is suitable for motorcycles and cars with M14 or M18 spark plug thread. It features convenient push-button side release valve, allowing repeated testing without the need to disconnect between tests. It has a high pressure double scale gauge display 0-300 PSI or 0-21 bar for accurate pressure check. Made of high quality solid brass, rubber and hose, our professional fuel tester is firm, rustproof, and wear-proof for long time use. Additionally, the kit is delivered in a blow moulded case for easy storage and transport.