Features:

Designed to detect a variety of common engine faults such as worn piston rings, cylinder head cracks, worn valves and blown head gaskets.
It checks the amount of leakage in an engine cylinder and helps determine the source.
Designed to check the amount of leakage in 4-stroke engines.
Deal for testing trucks and car models where clearance is minimal.
Fit for all local and imported cars and trucks.
Suitable for use on any petrol engine with 12mm or 14mm spark plugs to test the leakage of the cylinder.
Judge the leakage according to comparing the normal cylinder pressure of the engine with the measured pressure during the test.
3"(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. 

Description：

This is a high quality TU-21 cylinder leak detector, including double gauge system, 2-1/2" input pressure gauge, snap-on quick connect male connector, gauge scale 0-100PSI, 12mm, 14mm spark plug adapters, air regulator and carry case

Specification:

Case Color: Red or Blue
Material: Rubber + Aluminum + Iron
Dual Gauge Readings: 0-100psi, 0-7bar, 0-100%
Test Unit/Mode: bar, psi  
Special function: Get Accurate Readings
Pressure Gauge Diameter: 3" / 75mm
Pressure Gauge Height: 6.42" / 163mm
Spark Plug Adapters Thread Size: 12mm, 14mm
Hose Overall Length: 17.72" / 450mm
Short Hose Length: 11.81" / 300mm
Fixed Short Connector: M12 x 26mm 
Fixed Long Connector: M14 x 26mm 
Package Size: 34 * 25 * 10cm 
Package Weight: Approx. 1700g 

 
Package List：

1 x Dual gauged Leak Detection Unit(Suitable for use on any petrol engine with 12mm or 14mm spark plugs)
1x Flexi Hose
1x Fixed short connector
1x Fixed long connector
1x Storage Case