1) Middle-class executive chair back; Patented products.

2) Black nylon back frame, high rebound mesh fabric;

3) Shaped sponge cushion with seat shell;

4) Sitting back with fixed armrests;

5) Lock the chassis in place;

6) 85 # countersunk three centimeter black steam rod;

7) 340 # black nylon cone foot;

8) Silent casters