1.HEADREST:  Height adjustable

2.FRAME: Nylon frame

3.BACK:  YIDA OA mesh

4.ARMREST:  PU pad + Nylon

5.SEAT: High denisty sponge

6.MECHANISM: Lockable and freely lean

7.GAS LIFT: XIE QIANG (passed BIFMA test)

8.BASE: ∮320 tapered nylon base

9.CASTOR: Nylon castor