The product is a set of eight genuine GM ACDelco spark plugs R45TS. These standard configuration spark plugs are made of copper and are designed for gasoline engines. Manufactured by ACDelco Professional, these spark plugs are backed by a 1-year manufacturer warranty. With a voltage of 12V and an item length of 4.75 inches, these spark plugs are essential components for the secondary ignition system of vehicles. Made in China, these spark plugs are a reliable choice for maintaining proper engine performance.