Anji Modern High Back Ergonomic Mesh Computer Desk Office Chair with Lumbar Support and Headrest Ergonomic high back black mesh home office desk chair with headrest Built-in lumbar support and padded seat for all-day comfort and support Pneumatic seat-height adjustment, 360-degree swivel, heavy duty chrome base, dual nylon wheel caster Overall size: L 22.4 x W 26.8 x H 44.9-48.8 inch, seat height (lowest-hightest): 18.1-21.9 inch CA117 fire retardant foam