This complete engine compression test kit includes everything you need to check valves and rings, perform carbon buildup inspection and test for late timing on a wide range of vehicles. The kit comes with an extension hose, straight and angled fittings and a rubberized gauge protector. Check valves and rings, perform carbon buildup inspection, and test for late timing Adapters for a wide number of vehicles (straight, angled, M10, M12, M14, M18) 3 in. gauge has dual color scale from 0 to 300 PSI Comes with 20 in. extension hose, straight and angled fittings and rubberized gauge protector