Detailed Product Description ZY-205ABack outer shell, in black, PP ZY-205BBack inner pad, in black, PPZY-703-1CSeat shell,in black, PPZY-703DSeat plywoodZY-205MechanismZY-018Armrest BIFMAZY-PP280Blcak PP Chair baseexports Casterdust proof coverGas spring( 100 grade 3 )