1. Rolling Up Door 2. Material: Corrugated Aluminium 3. ISO9001:2000, TS/ISO16949:2002 Dear Friend! Wish you have a happy day and everything goes well in your place. Welcome to visit our website. I am glad to introduce our Semi-traielr to you:We design and produce the trailer according to your request: Such as size, Material of Traielr Box, Rated Payload Weight, The thickness of panel.Pls kindly ...