This is a set of 10 brand new Ford Motorcraft AGSP54 spark plugs that fit AMC, Chrysler, and various other models. These spark plugs have a thread diameter of 14mm and a hex size of 16mm, with a voltage of 12V. They are made of copper and are of standard configuration. These spark plugs are perfect for your gasoline-fueled vehicle and will provide reliable performance. The manufacturer part number is AGSP54 and the OE/OEM part number is 8U2J12405YA. These spark plugs have interchange part numbers A5KMR, 412, 3135, PP098E, and RC12LYC. The installation depth is .75in. This is a great deal for a set of high-quality spark plugs!