High back ergomonic mesh office chair

1) High back staff mesh office chair & 2D headrest
2) Mesh back +  black PP back frame (Back strength test 102KGS)+ 2D lumbar support
3) Height adjustable armrest with PU armpad
4) Fabric padded seat with high density foam inside
5) BIFMA passed CLASS 3 gaslift
6) Butterfly mechanism with tilt & lock function
7)  310mm PP base & BIFMA passed 50mm castors