The frame: Die-cut by quality cold-rolled steel plate. The seating: Laminated with the paint on the side. The appearance looks perfect, the seating is comfortable and strong. It can add cushion. Folded by the manual, and with the silencer. The desk: Laminated with veneer, heat-resisting, iron-resisting, anti-erode, waterproof, anti-score. The metal components: Has anticorrosion treatment of phosphorization and plastic spray, with were double snit-rusting It can removable.