Back Cotton: high-density foam shape. 
 Block sponge: sponge + steel + rubber band using one foam molding. 
 Seat back shell: high quality multi-layer peeling veneer molded by die pressing, surface compaction, veneer, decorative painting process. 
 Fabric: high quality hemp. 
 Handrail frame and stand feet: high quality aluminum alloy by die casting, surface spray and special metallic paint baked at high temperature can be adjusted according to the level of field gradient. 
 Armrest cover: the use of wood material production molding. 
 Writing Board: board of high density, melamine-coated surface, shaft positioning device using the unique, and to install silencer gasket, aluminum alloy support structure for connecting pressure injection molding. 
 Reply institutions: the use of gravity or damping response agencies.