This product is a set of 8 ACDelco Iridium Spark Plugs with the manufacturer part number 41-103. Designed for gasoline vehicles, these spark plugs have a voltage of 12V and are intended to improve ignition performance. The product carries a California Prop 65 Warning indicating potentially harmful chemicals may be present. Ideal for car and truck maintenance, this spark plug set is a reliable choice for ensuring optimal engine function.