EZRiser30 Height Adjustable Sit/Stand Desk Computer Riser, Dual Monitor Capable, 30" wide with Keyboard Tray - Black Finish Gas spring creates smooth and quick transitions Eco-friendly particle board finished with solid construction Stepless height settings for your free height adjustment Preset hole supports grommet installation Squeeze handle effortlessly adjust height Embedded groove holds most tablets and phones Large surface for placing more devices Non-skid silicone pads protect work surface from scratches or scuffs Adjustable height standing desk workstation allows you to work sitting and standing throughout the day. Height adjustment allows a comfortable standing or sitting position. Just squeeze the side handles and go from sitting to standing in seconds. Perfect for laptops, notebooks, and tablets. Fits most desks in any office or cube. Ergonomic design adjusts to most user's height. Springassisted and gas lift mechanism. Switches from sitting to standing position in seconds. Built-in keyboard tray. Easy set-up.