Back Cotton: high-density polyurethane foam cold-setting foam. 
 Block sponge: sponge + steel + rubber band using one foam molding. 
 Seat back shell: high quality multi-layer peeling veneer molded by die pressing, grinding through the profiling process, make multi-layer paint surface compaction veneer finishes. 
 Fabric: high quality linen cloth, flame retardant, stain-resistant, anti-static, anti-fade. 
 Handrail frame and stand feet: high-quality steel, welded steel pipe forming press, and after grinding, rust, phosphate, electrostatic dusting, high-temperature baking, etc. Process. 
 Armrest cover: the use of wood material production molding, multi-layer paint process. 
 WordPad: The unique positioning of the shaft device, and to install silencer gasket, aluminum alloy support structure are connected pressure injection molding. 
 Board for high density, melamine-coated surface, colors. 
 Reply institutions: The gravity response agencies or aerated spring rod damping response agencies.