Desk riser allows you to go from sitting to standing with ease. Stop at any position from 6-3/10" x 19-1/2" when adjusting the height. Desk riser operates with a double gas-spring monitor lift for smooth, easy ascension. The top worksurface includes a convenient iPad/iPhone slot. Quick-release keyboard tray provides easy reach to your keyboard even when standing and can detach easily when necessary. Keyboard tray is curved slightly for easy, ergonomic access to your keyboard while maintaining ample room on both sides for your mouse or other supplies. The frame is made of sturdy steel. Worksurface and tray are made of medium-density fiberboard with PVC finish.