Ergonomic Adjustable Design Equipped with dual high quality gas rods, the computer desk can be adjusted within the range from 27.5 to 42. Thus, you can lift it up and down to fulfill your sitting or standing requirement. No wonder, such ergonomic design extremely relieves your fatigue throughout a long workday. Smooth Rolling Casters for Convenient Mobility There are 4 universal casters on the feet, intended to help you move the laptop desk from room to room effortlessly. And 2 of caters are lockable, so that you can keep it in position. More, wear-resistant caters can roll on different surface silently, while causing no damage to your floor. Combine Stability with Durability Made of superior steel material, the sit stand desk features exceptional rigidity, no distortion at all. Meanwhile, the standing desk is composed of 2 supporting rods and I shaped base, which strikes perfect balance between flexibility and stability. It is sturdy enough for strong load capacity