National Fleet Products proudly offer Poly Fenders by Jonesco Plastics. Jonesco is a world leader in Poly Fenders. Since 1968, Jonesco Fenders have been used in all types of climates and conditions. They are designed for use where durability and long life are a primary concern, used on all types of vehicles, work trucks, construction equipment, agriculture equipment and many other custom applications. Have a special need? We offer custom fenders as well.