Specification Brand : BZJUNZE BulletPoint1 : Widely Compatible:This TU-21 Leak Down Compression Tester & Cylinder Leakage Test Kit Fits For Most Gasoline Engines With Spark Plugs(Within 20mm). BulletPoint2 : How To Use:Install the hose on the cylinder, connect the device to the air supply, calibrate the leak counter, and secure the device to the cylinder hose. Perform the diagnosis by observing the amount of leakage shown on the cylinder leak gauge and listening for leaks at each point in the vehicle system. BulletPoint3 : Excellent Functionality:TU-21 Cylinder Leak Down Tester connected to an air compressor can help detect common engine faults such as worn piston rings, worn valves, cracked cylinder walls and blown cylinder head gaskets.It checks the amount of leakage in the engine cylinder and helps determine the source of the leak. BulletPoint4 : New Accessories:This cylinder leak detector kit has added 6 new accessories. On the basis of the ordinary kit (including 1PC double-gauge manifold, 1PC rubber hose and 2PCS metal adapters), we have added 2PCS universal push-in connectors, 2PCS threaded adapters, 1PC M14 extension rod and 1PC extension hose. It can provide you with more choices and better maintenance experience. BulletPoint5 : Quality Service:We have excellent service, which means you can use our products with confidence. If you find any quality problems within one year of using the product, we can directly replace it for you! IncludedComponents : New Cylinder Leak Down Tester Kit ItemName : New Cylinder Leak Down Tester Kit,Gasoline Engine Compression Tester kit with Extension Rod,Cylinder Leakage Tester Set for Pressure Check and Leakage Rate Test #TU-21 ItemPackageDimensions_Height : 5 inches ItemPackageDimensions_Length : 10 inches ItemPackageDimensions_Width : 5 inches ItemTypeKeyword : automotive-stethoscopes Manufacturer : BZJUNZE MeasurementAccuracy : +/-0.5% ModelName : ZKEOOIVAqvswgautok ModelNumber : TU-21 TU21 NumberOfItems : 1 PartNumber : TU-21 ProductDescription : New Cylinder Leak Down Tester Kit ProductSiteLaunchDate : 2025-05-28T06:15:23.124Z SupplierDeclaredDgHzRegulation : not_applicable SupplierDeclaredHasProductIdentifierExemption : 1 UnspscCode : 25191800