The under-desk shelf for a keyboard and mouse is the perfect enhancement to an Alera™ Valencia® series desk. Simply attach the four brackets under desk to keep your keyboard or mouse tucked away when not in use. Allows the desktop to be used as a writing or work surface while the keyboard and mouse are nestled underneath. 0.75" thick with sliding mechanism for sliding in and out. Series Name: Alera™ Valencia® Series; Workstation Type: Straight; Sit-to-Stand Option: No; Keyboard Tray Dimensions (W x D): 28" x 12" x 0.75".