... a modular and knock-down product. When being deliveried, it can be knocked-down to save space. When being erected ... 8 hours. The structure is connected by bolt, so it can be assembled and reassembled for many times. Waterproof design ... Panel50, 75, 100mm thickness double color steel sandwich panel13Exterior DoorSteel frame sandwich panel door, szie:820mm*2000mm14Interior DoorSandwich panel door, size ...