The Snap On Tools Compression Gauge Set MT308KB is a high-quality diagnostic tool designed for passenger vehicles with gasoline engines. This set includes 3 hoses, fittings, a carrying case, and an adaptor hose, making it convenient and easy to use. With a maximum PSI of 300, this compression tester from the United States features a pressure release button for added safety. Although used, this compression gauge set is a reliable and durable option for automotive maintenance and repair.