The product is a set of 4 Champion Copper Plus Spark Plugs, model 415 RN9YC, made in the USA. These spark plugs are designed for gasoline engines and have a 12V voltage requirement. They feature a copper material construction and a 14mm thread diameter for standard configuration. With a vintage part designation, they do not come with a performance part claim, but are backed by a 1-year manufacturer warranty. Additionally, they carry a California Prop 65 warning for nickel content.