Feature:1. Function: Leakdown gauge tool can hook up to air compressor (NOT included) to detect common engine faults such as worn piston rings, worn valves, cracks in cylinder wall and blown head gaskets.2. Dual Gauge Design: You can use the compression gauge tool to test the pressure and leak rate of the cylinder under test at the same time, with the 0100 psi or 07 bar and 0100% range, 3in 7.62cm gauge is more clear to read.3. Complete Kit: The gauge manifold assembly comes with rubber hoses, AR2000 pressure regulators, American air plugs and aluminum manifold bodies. Can also work well with 111/2in and 413/4in hose.4. Premium Valve Knob: The valve knob is made of alloy and plastic, used to adjust the pressure of the input air from the air compressor. Pull out for use and push back to lock, convenient for using.5. High Compatibility: 2 gauge cylinder leakage detector and compression tester kit works well with gasoline engines within 20mm with spark plugs. Deep thread for better fitting snap, anti slip and durable.Specification:Item Type: Cylinder Leakage TesterMaterial: Metal, RubberTest Range: 0-100 psi / 0-7 bar (pressure gauge); 0-100% (leakage gauge).Air Supply Pressure Regulating Valve (AR2000): The air compressor connection adopts American air plug.The black valve locks when you push back and unlocks in reverse.18in/45.72cm Hose Working Pressure: 300 psi. Hose can withstand twisting and extreme pressure for safe use.Use 4 ball bearing quick disconnects for better grip.It accepts short and long rubber hoses (11-1/2in and 41-3/4in) (11-1/2in/29.21cm and 41-3/4in/106.05cm) and universal push on connectors.Function: The gauge scale shows the cylinder pressure value and tightness.Detect cylinder system failures and locate leak sources.Applicable Models: Universal.Package List:1 x Cylinder Leak Tester2 x Hose3 x Aluminum Rods4 x Metal Adapters1 x Red BoxNote:1. Air pressure should be controlled within the range of 45100 psi.2. Before connecting the cylinder compression tester to the air compressor, turn the knob counterclockwise.3. Please read the manual carefully before operating, and it is best to be accompanied or guided by professionals when working.4. Arrange all used tools and equipment and do not leave them in, on or near the engine.