Cheap black mesh staff office chair nylon base swivel armchair for conference meeting room

1) Middle Back with office Swivel chair
2) High density mesh seating with mould sponse
3) Adjustable lumbar support
4) nlyon base with nylon casters
5) Double-functional mechanism, rocking and locking, heigh adjustable
6) PU armrest
8) 150kg capacity weight
9) Color Optional