Wood: choose thermoforming plywood seat and back board, thickness of 17 ~ 20 mm; Birch surface level plane cut wood, leather acuity 0.6 mm thick; Armrest of birch wood, and the dehydrated degreasing process, moisture content of 12% or less, all wood has insect-resistant, anti bacteria, fire prevention of the processing. The color and material will be subject to the tenderer to provide samples. Armrest frame: high quality plate, put thick 0.6 mm or higher level of birch plane cutting wood, environmental protection on the surface of polyurethane paint. Birch wood copying armrest lid: level, and the dehydrated degreasing process, moisture content control within 12%; Environmental protection on the surface of polyurethane paint package: birch board + import or well-known brands abroad supplier to provide the raw material of cold solid foam forming sponge, density: 65 kg/M3, hardness: 40 °, 45 °, shell plate