Description: 【Efficient Exhaust System】: This compression tester set is designed to quickly assess the condition of your vehicle's catalytic converters and detect any blockages in the exhaust system 【Accurate Pressure Reading】: Equipped with a high precision pressure gauge, this engine cylinder compression tester provides clear and accurate exhaust back pressure readings in real time through the connected hose, helping you determine if there are any blockages in the exhaust flow 【Versatile Hose】: The exhaust back pressure gauge included high temperature hose can be directly connected to the oxygen interface or exhaust system, suitable for a variety of vehicle models 【Essential Tool for Auto Repair】: Engine cylinder pressure gauge great for daily maintenance at auto repair shops, inspection stations or DIY car owners. This tool avoids unnecessary disassembly, thereby improving work efficiency 【Compact and Portable Design】: This vehicle exhaust system too is small in size, easy to store and carry, and is perfect for mobile diagnosis and outdoor repair tasks Specification: Material:Rubber PP Size Chart: 27.5cmx20cmx5cm/10.83inchx7.87inchx1.97inch Package Includes: 1 Set Exhaust Back Pressure Gauge Note: Please allow slightly errors due to manual measurement and different monitors.