Designed to detect a of common engine faults such as worn rings, cylinder head cracks, worn valves and blown head gaskets.It checks the amount of leakage in an engine cylinder and helps determine .Designed to check the amount of leakage in 4-stroke engines.Deal for testing trucks and car models where clearance is .Fit for all local and and trucks.Suitable for use on any petrol engine with 12mm or 14mm plugs to test the leakage of the cylinder. the leakage according to comparing the normal cylinder pressure of the engine with the measured pressure during the test.3inch(75mm) diameter gauge with dual gauge system and gauge scale displays percentage of cylinder leakage and cylinder pressure.Pressurized air is supplied to each cylinder and in moments displays a rate of leakage measure from 0 to 100%.Dual gauge leak detection head with quick coupling & pressure release button, manometer with two test pressure: 0-100psi, 0-7bar.This is a high TU-21 cylinder leak detector, including double gauge system, 2-1/2inch input pressure gauge, snap-on quick connect male connector, gauge scale 0-100PSI, 10mm, 12mm plug adapters, air regulator and carry caseDual Gauge Readings: 0-100psi, 0-7bar, 0-100%Test Unit/Mode: bar, function: ReadingsPressure Gauge Diameter: 3inch / 75mmPressure Gauge Height: 6.42inch / 163mm Plug Adapters Thread Size: 10mm, 12mmHose Overall Length: 17.72inch / 450mmShort Hose Length: 11.81inch / 300mmFixed Short Connector: M12 x 26mmFixed Long Connector: M14 x 26mmColour:Black + RedMaterial:PlasticPackage Contents:1 x Dual gauged Leak Detection Unit(Suitable for use on any petrol engine with 10mm or 12mm plugs)1 x Hose1 x Fixed short connector1 x Fixed long connectorOnly the above package content, other are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.