The product is a set of 4 Bosch Super W4CC spark plugs designed to fit Porsche and Jaguar vehicles. These copper spark plugs have a 14mm thread diameter, standard configuration, and a 0.70mm gap. Manufactured in Germany, they are performance parts suitable for gasoline engines. With a voltage of 12V and an installation depth of 19mm, these spark plugs offer high-quality ignition for vintage vehicles. Bosch is a trusted brand known for producing reliable automotive components, making these spark plugs a valuable addition to any car or truck. Representative item set is shown. Vintage new old stock spark plugs. Boxes may have mildew odor from storage. Set weight 9 oz. 21mm hex size. Made in Germany. No returns on installed items or partial sets. Please review our business policies in our store for information regarding returns, shipping and warranties. Most items have 30-day returns along with free fast shipping in 1 business day (see details). Message us anytime. Buy from a trusted 16+ year seller!