Infinitely adjustable seat height with a special children's top lift. The backrest is ergonomically shaped and can be adjusted in height and depth without steps. Comfortable, contoured flat seat. Aesthetically pleasing and stable black polyamide base. Equipped with load-dependent braking safety double wheels for carpeted floors. This means the chair only rolls under load; when not in use, the wheels brake to prevent unwanted rolling away. This model has been certified by LGA Nürnberg as part of a safety inspection. This item is delivered in disassembled form. Assembly can be completed in just a few simple steps. No assembly is required for gas springs, chair wheels, footrests, etc.