Multi-function & Lumbar support:The chair can rotate 360 degrees and can be adjusted up and down according to your height to find a more comfortable position. The cute properly designed lumbar support provide optimum support,have significant effect on your lumbar pressure. Extra comfortable:brand new dense thicker sponge coated with finest soft PVC leather, stylish ergonomic backrest works perfectly with the back and spine to ease the pains to make you happy and focus on your work. Easy Operation & Smooth Rolling:Equipped wih a tall & smooth lifting gas lift cylinder,adjustments are easily controlled with hand lever, to meet users of varying heights and applications. Sturdy Construction & Safety Security:heavy duty base and SGS tested certified pneumatic gas lift, very sturdy and durable.Wight capacity 400lbs extremely safe.Anti-exploding iron plate as double protection for your safety. 7*24-hour after-sales service guarantee. Any product problem is guaranteed for one year, and there