Weight capacity 350lbs extremely safe:used heavy duty base and SGS tested certified pneumatic gas lift, very sturdy and durable.Anti-exploding iron plate as double protection for your safety. Adjusting the height with the switch in the middle.Fully adjustable height from 20.4 to 28.3,suitable for your multi-tasking work. Rolling smoothly:reinforced nylon dual swivel casters provides easy movement & extra stability and longevity.Safe for all hard or soft floors,like wood/laminate/vinyl/tile/carpet.7*24-hour after-sales service guarantee. Any product problem is guaranteed for one year, and there is no reason to return it for free. Please contact us for any questions.