Infinitely variable seat height adjustment with Toplift, high contoured backrest with spine shaping, infinitely variable height adjustment, intervertebral disc seat for optimum support in the pelvic area, synchronous mechanism for synchronous adjustment of seat and backrest tilt with body weight adjustment, continuously lockable, PA base black, load dependent braked safety double castors, only suitable for carpeted floors, exchangeable with hard floor castor set (not included), dismantled with assembly instructions, seat width 450 mm, height 420 - 550 mm, depth 450 mm, backrest height 570 mm. Weight: 16 kg. Up to max. body weight 110 kg. Warranty: 3 years. Certificate: GS, Intertek Fürth.