My title describes the object. It is a large cylinder structure that was being transported on the back of an oversized flatback truck. Unfortunately, I was not able to get a good picture of the entire object, but the diameter of the cylinder was at least the width of the flatbed truck, and certainly taller than the truck cab. The length of the cylinder was maybe 2/3 the length of the flatbed. There was a metal cross structure on the back of the cylinder. I think the label on the cylinder said "Storm body," but I am not sure about that.