This engine compression tester kit is designed to check for internal engine failures such as bad valves, worn-out piston rings or head gaskets, or excessive carbon build-up. This kit is delivered with 1 rubber hose and 4 heavy-duty spark plug adapters in different sizes to fit various vehicles. The straight and angled tube connectors have a rubber cone that doesn\'t need to be threaded and can be used to test the compression of almost any engine. The easy-to-read gauge has a dual scale that ranges from 0-300 psi and 0-21 kg/cm². Delivery includes 1 compression tester, 1 rubber hose, 4 spark plug adapters, 1 straight pressure tube and 1 angled pressure tube. All pieces are neatly organised in a blow-moulded case.