Ergo-dynamic high back posture chair with pump up lumbar Suitable for 24hr use Fully certified and endorsed by a fully qualified chiropractor Deep cushioned seat and back pads Features gas height adjustment, ratchet back height adjustment with independent back and seat tilt Also features weight tension control and seat slide to adjust seat depth Chrome wheel base with easy glide castors Complete with soft padded height adjustable arms Black fabric back Seat available in a choice of colours Medium back chair also available 5 year warranty