Features: 1、Professional test tools are simple, efficient and fast to lock the source of abnormal engine noise. Track water, oil, and airflow sound to judge abnormal cylinder stethoscope. It is suitable for the diagnosis of abnormal engine noise. Please use it with confidence. 2、he engine stethoscope is made of high-quality stainless steel material, which is highly reliable, corrosion-resistant, wear-resistant, sturdy, and not easy to crack. It can quickly lock the source of abnormal engine noise, track the sound of water, oil, and airflow to judge abnormality and use it for a long time. 3、100% brand new high quality engine tester, strictly and comprehensively tested to ensure the best quality before leaving the factory. 4、You can use a stethoscope to monitor the parts that emit abnormal noise, including monitoring the engine, bearing, motor, chassis, gearbox, etc., to detect and locate the source of abnormal noise 5、The engine hearing tool is easy to install, can directly replace the old or damaged, it matches your original perfectly. Specification: Condition: 100% Brand New Item Type: Cylinder Stethoscope Material: Stainless Steel Package List: 1 x Cylinder Stethoscope Set