... seat & seatback----high quality plywood,take shape by thermo-compressing,with advanced real wood surface;Sponge----erection of steel work ... steel plate ,take shape by hydraulic;Armrest----imported log with polyester coating;Cloth----high quality specific cloth,fireproof,abrasion ... shape,high density aluminium alloy supporter,middle density board with fireproof board at surface; seat structure:This type ...