The design of seat & base of b111b is super ellipse. this square circle gives motion stool a visual of stability & simple, rounded appearance. From the seat, lifting button, tube cover & base are shown super ellipse shape consistenly

B111B can rotate & sway to any side and it can offer support for sit to stand gestures, satisfies customers' various demands. Two smooth hollow curved surface at underside of seat shell formulates the handles naturally. and makes the chair can be moved easily, refurbished