The product is a set of Autolite 2545 spark plugs designed to fit vehicles such as the Aerostar, Cougar, Town Car, and LTD. These copper resistor spark plugs have a 14mm thread diameter and a standard configuration. With a vintage part status and gasoline fuel type, these spark plugs are manufactured in the United States and carry a California Prop 65 Warning for cancer and reproductive harm. The Autolite brand ensures quality and compatibility, making these spark plugs a reliable choice for ignition systems in various vehicles. Exact item set is shown, Vintage new old stock spark plugs. Plugs may have small surface rust spots, as shown. 5/8 inch hex size, 14mm thread diameter, 20.5mm reach. Set weight 12 oz. Made in USA. 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!