Best ergonomic mesh swivel office chairs

1) High back mesh office chair
2) Mesh back +white PP with fiber back frame, height adjustable lumbar support
3) PP with fiber fixed armrest
4) Fabric padded seat with injection molded foam inside
5) BIFMA passed butterfly mechanism with tilt&lock function
6) BIFMA passed CLASS 3 gaslift
7) 350mm chrome metal base with BIFMA passed 50mm PU nylon base

8)Packing CBM:0.135m3=1PC