The Sealey 6 Piece Compression Test Kit is a professional diagnostic tool designed for testing engine cylinder compression on petrol engines. This comprehensive kit features a large 63mm diameter gauge with clear pressure readings up to 300psi (20kg/cm²), making it ideal for accurate diagnosis of engine condition and performance issues. The kit includes a versatile selection of deep thread adaptors in 10mm, 12mm, 14mm and 18mm sizes to suit various spark plug configurations across different engine types. Both straight and angled 130mm push-on connectors are provided for easy access in tight engine bays, whilst the 300mm flexible extension ensures testing can be carried out comfortably even on awkwardly positioned cylinders. Suitable for use by mechanics, mobile technicians and vehicle maintenance professionals, this compression tester helps quickly identify problems such as worn piston rings, valve issues or head gasket failures. The complete kit is supplied in a robust storage case to