The product is a set of four Autolite spark plugs with a copper core design. The manufacturer part number is 386, indicating the specific model of the spark plugs. Autolite is known for producing high-quality ignition components, and the copper core design of these spark plugs suggests that they may offer superior heat dissipation and conductivity for improved performance in the car or truck's engine. Perfect for anyone looking to upgrade or replace their current spark plugs with reliable and efficient components.