Infinitely variable seat height adjustment with top lift (LGA tested). Comfortable, highly upholstered flat seat with knee roll and integrated Body-Balance-Tec joint. Ergonomic backrest, "high back" with mesh covering, height-adjustable via "up-and-down" system. Point synchronisation mechanism for synchronous adjustment of the seat and backrest tilt, spring force can be individually adjusted to the body weight, conveniently operated via a sideways pull-out adjustment lever, can be locked in place several times. Seat tilt and seat depth adjustment for optimum adaptation to body size. Elegant and stable designer base in polished aluminium equipped with load-dependent safety double castors for carpeted floors. Including height-adjustable armrest "H1", with soft pad armrests. This model bears the GS mark of the LGA Nuremberg and fulfils all safety-related requirements.