Features: - Can be quickly set to your motor / car, get accurate readings in valves, piston rings, cylinder bores or head gaskets. - Manometer with two test pressure: 0 - 300 PSI / 0 - 21 kg / cm2. - Drain valve with full copper nickel plating, anti-oxidation and corrosion. - M10 thread is suitable for motorcycles, M12 / M14 / M18 threads are suitable for car. - With rubber protection to prevent scratches. - Come with 2 rubber cones that don't need to be threaded into the head, can test the compression on almost any engine. - Pressure gauge diameter: 75mm, four thread size: M10 x 1.0mm, M12 x 1.25mm, M14 x 1.25mm, M18 x 1.5mm. - Hose overall length: 430mm, pressure tube length: 150mm, angled pressure tube length: 160mm.