ZY-203 kit,including below parts: Black back ZY-203a outer shell & ZY-203b inner shellBlack wide plastic tube covering the back bar ZY-1# secretary mechanism with back bar& iron sheetBlack ZY-703-1 seat shell & seat plywood(1.2cm)ZY-201 PP armrests,can pass BIFMA standard(can be changed to other style according to clients' need)Normal gaslift with dustproof cover outside.ZY-PP280, 280mm PP base(can be changed to other materail bases,such as nylon,steel bases)Easily-moved nylon castors Chair parts.chair accessory,chair components