• Backrest: Nylon /White plastic /Without lumbar support • Seat: Molded foam /With seat cover • Armrest: 1D fixed armrest /PU+PA /White plastic • Mechanism: Innovative Bock mechanism from Germany • Base:DIA 680mm Five star nylon base /White plastic • Castor/Glider:60R / Hollow PA+PU stand brake castor / White plastic /Without brake function,suitable for soft floor • Gas lift: Class 3 / Black powder coating / Fixed, do not swivel