Cooling System Tester Adapter Tester adapter for the 9300 and MT-300 cooling system pressure testers. Professional grade test equipment to ensure an automotive cooling system is operating at the correct pressure. Made from high quality materials to ensure durability. Designed to test automotive cooling systems. Attachment Type: Female Threaded Carrying Case Included: no End 1 Outside Diameter: 2.23 IN End 2 Inside Diameter: 1.9 IN Gasket Or Seal Included: Yes Height: 2.68 IN Material: Metal Prop 65: WARNING: Cancer and Reproductive Harm - www.p65WARNINGs.ca.gov