The Peterbilt Unibilt Sleeper Extender is a practical and versatile product designed to enhance the functionality of your Peterbilt truck. Made of durable fiberglass, this extender is available for both the top left and right sides. With pre-drilled holes, it is easy to install and sold individually. It serves as a direct replacement for OEM part numbers 13-04402L and 13-04402R. This extender fits most Peterbilt Unibilt models with 48-inch or 63-inch high roofs, manufactured between 1994 and 2007. Improve your truck's storage capacity and convenience with the Peterbilt Unibilt Sleeper Extender.