The WIlkhahn swivel chair ON is a range that stands for the latest milestones in designer office chair development. For the first time, the patented Trimension® technology offered by ON has succeeded in perfectly synchronising three-dimensional exibility with our bodies. And what’s more it offers superb design and an extensive product family that caters to virtually all requirements. The three backrest heights are adjustable by 60 mm (medium-high, high and high with a headrest), three upholstered types (Fiber ex, extra padding and management grade upholstery) and three types of 3D armrest (standard, soft, leather).