... 2.powder coated armrest+base 3.seat height adjust,back tilt 4.hot sell Office chair,office furniture,manager chair,executive ... padded armrest,powder coated nylon base,Y-19 mechanism, back tilt, seat height adjust,high quality, competitive price. Chair description:1 ... : Y-19 mechanism, seat height adjust, back tilt, back can be fixed not to tilt. We ourself manufacture the mechanism, have passed ...