The Sealey CT951 is a compression tester designed for diagnosing engine performance issues across petrol engines. This professional diagnostic tool enables mechanics and technicians to quickly assess cylinder compression, helping to identify worn piston rings, valve problems, or head gasket failures. The large, easy-to-read gauge displays both metric and imperial readings, covering a pressure range from 0-300psi (0-2000kpa). A 12-inch flexible hose provides the reach needed for accessing awkward spark plug locations, whilst the side release valve allows for quick pressure discharge between cylinder tests. Versatile adaptor options ensure compatibility with most petrol engine applications. The kit includes screw-in 14mm and 18mm adaptors for secure fitment, plus a 150mm rigid stem cone adaptor that fits most spark plug holes without threading. At just 0.38kg, this lightweight tester arrives in a protective storage case for organised workshop storage and portability. Features and Benefit