office chair is very comfortablem. Powder coated armerest and base, Nylon castors,tilt mechansim. Office chair1.Item no.:ZR-8111;2.Powder coated armerest and base, Nylon castors,tilt mechansim;3.Different colors availabel;4.Packing:export carton 1pc/ctn;5.Conveyance:QTY:20 FCL:165PCS; 40HQ:395PCS;6.This new model office chair is very comfortable.