FEATURE: - Wide Compatibility - Compatible with a variety of common engine faults such as worn piston rings, cylinder head cracks, worn valves and blown head gaskets. Includes multi-size adapters (straight + curved + male fittings) - Professional Design - Designed to check the amount of leakage in an engine cylinder and helps determine the source. Observe the change in the readings in the cylinder to diagnose the fault, suitable for both novices, and professional mechanics, simple and convenient - Dual Reading Gauge - Gauge Panel is easy to read and comes with a lightweight & scratch-resistant resin cover and a rubber cover to ensure a long service life (0-300 psi, 0-20 bar) - Industrial Case - For the convenience of storage and carrying, we have specially made a premium ABS case, which has excellent shock absorption performance to protect the gauge from damage SPECIFICATIONS : Material: Rubber, Steel Diameter Gauge Size: Ø63mm Extension Hose Length: 400mm Gauge Reading: 0 to 300 PSI / 0 to 20 Bar Gauge Reset Button: Yes Adapter Fitting Size: M10, M12, M14, M18 Spark Plug Adapter: Angle and Straight w/ Rubber Cones PACKAGE INCLUDE: 1x Gasoline Compression Tester 1x Hose 4x Thread Adapters 1x Straight Line Pressure Pipe 1x Angled Pressure Pipe 1x Storage Case