... sheet, 0.7mm Frame: 20x40 ellipse steel tube, 1.2mm thick. Powder coated, plastic tube end 2 chair: seat and backrest are plywood ... face fire-proof board Frame: 19mm steel round tube, 1.2mm thick ... , 20x40 ellipse steel tube, 1.2mm thick. Powder coated, plastic tube end G.W.: 25KG CBM ...