The Peterbilt 359, 370, 389 23 Inch Diameter Fuel Tank I Panels are a practical and reliable solution for your truck's fuel tank needs. Made of stainless steel or paintable steel, these panels are designed for 26-inch diameter fuel tanks and feature an I panel design. They are available with a blank panel or 4 - 4 inch light holes, although lights are not included. With easy mounting and a fully enclosed panel, these fuel tank I panels are a great fit for most Peterbilt 359, 379, and 389 models. Upgrade your truck's fuel tank with these durable and functional panels.