This item is delivered disassembled. Assembly can be completed in just a few simple steps. Of course, no assembly is required for gas springs, chair casters, footrests, etc. The ergonomically shaped backrest and seat recess feature chrome-colored edge protection. The backrest with integrated rocking function gently follows the movements of the upper body. The seat height can be adjusted continuously with a top lift. It has an aesthetically pleasing and stable aluminum base, chrome-plated. Equipped with load-dependent braked safety double casters for carpeted floors. This means the chair only rolls under load; when not loaded, the casters brake to prevent unwanted rolling away. Recommended age group: 8 - 11 years.