New in the box. Standing for portions of the workday can promote increased circulation and better posture. This WorkPro desk riser makes it easy to transform your existing standard desk into a sit/stand workstation, so you can switch between sitting and standing to suit your preferences. 30"W x 29-3/16 "D, Black Sleek, compact design has a minimal footprint to maximize the use of your work surface area. WorkPro Perform desk riser adjusts quickly and effortlessly up to 18-5/8" to accommodate users of just about any height. Self-locking mechanism provides ultimate stability and functionality. Monitor height adjustment for correct ergonomic fit. Weight capacity tested to support 35 lb. Monitor not included. Assembly required. Desk riser with single-monitor design is great for most work areas. Monitor sold separately. WorkPro Perform desk riser (single monitor) in black coordinates with virtually any desk. Tested to meet ANSI/BIFMA Performance Standards - Manufacturer testing has been conducted on this product to meet specific performance requirements and safety standards set forth by the American National Standards Institute (ANSI) and the Business and Institutional Furniture Manufacturers Assembly Required