Chair seat height from the floor surface in the lower position, mm, no more than;550 Chair seat height from the floor surface in the upper position, mm, not less than;800 Chair height in lower position with raised back, mm, not less than;1270 Width (seat, backrest and leg section), mm, not less than;500 Overall width of the chair (along the armrests), mm, not less than;650 Seat depth, mm, not less than;480 Chair length in unfolded position, mm, not less than;1700 Chair length in lower position with raised back, mm, not less than;1100 Tilt of the back section up to the plane of the seat:; not less than;20° no more than;85° Seat tilt up to the horizontal, constant, not less than;7° Tilt of the leg section down to the plane of the seat:; not less than;15° no more than;90° Simultaneous chair seat and back forward tilt (“Help” function), not less than:; up;7° down;15° Fixed tilt angles of the arm rests relative to the seat:; up;+25°,+90° down;-25° Safe working load, kg;160±5 Chair weight (without additional accessories), kg, no more than;90