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811B
1) new material nylon
2) back and seat: import hight elastic mesh
3) Ratchet back, adjust the backrest up and down for three class
4) aluminum armrest frame and 3D multi-function armrest
5) three class locking,multi-function mechanism with the seat slider
6) SHS 3 class gas lift
7) 350mm aluminum base pass BIFMA test
8) 60mm Chrome PU castor
