This automotive compression tester works with most car models with gasoline engines. It comes with adapters and pipes in different size to fit different models. It is widely used for checking compression on engine cylinder quickly and accurately. The diameter gauge with dual colour coded scale with 0-300 psi/0-20 bar, can be quickly set to your motor or car and get accurate readings in valves, piston rings, cylinder bores or head gaskets. The drain is anti-corrosion and oxidation with full copper nickel plating. In addition, the included extension bar makes it possible to safely and easily perform compression tests on vehicles with difficult access points. The set is delivered in a blow-molded carrying case for easy storage and transport.