Conestoga – Conestoga trailers include a rolling tarp system that could be used to cowl and uncover the trailer and protects the load. Extendable Flatbed – Also known as Flat Bed Stretch trailer is right for cargo too long to move on a standard shock trailer. Contact Us MJ TruckNation http://boxtruckdealernearme55305.blogzet.com/the-flatbed-trucks-4-sale-statements-14922420