The Champion 415 RN9YC Copper Plus Spark Plugs are a pack of 8 direct replacement spark plugs designed for gasoline vehicles. Made with copper material, these spark plugs are manufactured by Champion Spark Plug in the United States. With a voltage of 12V, they come with a manufacturer warranty and are suitable for a variety of vehicles. These spark plugs are reliable and efficient in providing the necessary ignition needed for optimal engine performance.