Specifications: Material: sponge, mesh, polyester, steel. Product Weight: 31.9 lbs / 14.5 kg. Bearing Capacity: 330 lbs.Size of the Chair: Seat height: 19.1 ~ 23 in (48.5 ~ 58.5 cm). Size of backrest: 18.9 × 21.3 in (48 × 54 cm). Size of headrest: 11.1 × 6 in (28.3 × 15.3 cm). Size of cushion: 19.3 × 20.1 in (49 × 51 cm). Diameter of base: 20.1 in (51 cm). Total height of the whole chair: 46.1 ~ 52.4 in (117 ~ 133 cm).Why choose the Becko ergonomic chair? - The heights of cushion, armrest, headrest, lumbar pillow can all be easily adjusted. You may customize your own comfy chair. - Synchronized reclining design allows you to adjust the backrest at five angles ranging from 90° to 125°, with the cushion and armrests tilting synchronically. Considerate design only to offer you with comfort and helps to switch between work state and rest state. - Breathable mesh backrest is sturdy and durable enough to keep your back cool and dry even in the smoking hot summer. - 3-inch thick high density original formed sponge cushion, softer than regular sponge, effective in reducing pressure on hip nerves and blood vessels, and conducive to blood circulation in your legs. - Firm chassis & strengthened base ensure you dual stability. - Smooth PU-edged casters moves silently and cause no harm to the floor. - Comes with a maximum bearing capacity of 300 lbs.Frequently Asked Questions: Q: What should I do in case of missing or damaged parts upon the arrival of the package? A: Please feel free to contact our Customer Service for free replacement. Q: Why are there scratches on my new chair? A: During the long-distance transportation, there are rare cases where some minor scratches may be caused due to slight accidental bumps. If such case happen to your new chair, please contact our Customer Service for replacement or refund.