The product is a lot of 10 AC Delco GM Spark Plugs ACNITER II with the manufacturer part number R44TX. These vintage spark plugs are made in the United States and are designed for gasoline engines. They are standard configuration spark plugs with a voltage of 12V and a length of 2.5 inches. These spark plugs are not performance parts but are genuine GM parts, making them a reliable choice for ignition systems in cars and trucks.