AT4001 Compression is used to measure the value of the compression pressure in gasoline engines. The presence of compression tester helps the car owner to identify infringements in engine work his car at an early stage, in order to avoid serious damage. AT4001 is composed of the manometer, reliable hose with two adapters and stem with conical rubber adapter. For convenience, it also comes with a plastic suitcase, which contributes to convenient storage and transportation. The device is very high quality, so buy Compression AT4001 - the perfect solution, the ratio of price and quality you will be pleasantly surprised.