Ergonomic Ultra Slim 24' Keyboard Riser: Features a 23.6 x 11.8 platform that raises your keyboard and mouse to a comfortable typing position. Perfect addition to a standing workstation, supporting up to 11 lbs of weight 5 Height Settings: Innovative scissor-lift design features 5 different height settings (8.5, 10.4, 12, 14.4, and 15.6) to accommodate your ideal setup