1) Middle class chair back; Patented products.

2) Customized gray nylon back frame with adjustable waist support and high rebound mesh;

3) 60 shaped sponge cushion with seat shell;

4) 3D armrest with PU armrest surface;

5) Single handle three-speed locking chassis;

6) 85 # countersunk three centimeter black steam rod;

7) Customized 350 # gray nylon feet;

8) Customized silent casters