This product is an automobile exhaust back pressure tester. It is made of rubber, glass and iron materials. It is safe and practical, and has excellent texture. It provides you with a simpler detection method and more accurate detection results. Universal structural design, professional and practical, and widely applicable, it is detecting the condition of automobile exhaust . Features -Color:Multicolor -Material:Glass, rubber and iron -Size:81.00X7.00X3.20cm/31.83X2.75X1.26in -Fine workmanship, good texture, simple and practical, it can test the front pressure of the converter to determine whether the exhaust is blocked. -Fast and accurate, time-saving, precise and efficient, it will be your for testing tools. -Reasonable structure, simple operation, convenient application, can help quickly and accurately. -The tester can complete your test work help you better understand your car information. -This is a very professional and durable automotive exhaust back pressure tester suitable for most vehicle applications on the market. Package list: 1 x Tester