Fellowes 8035901 Professional Corner Executive Keyboard Tray, 19w x 14-3/4d, Black Height and tilt indicators let you customize keyboard tray settings Designed and manufactured for Fellowes by Humanscale Comfort-Lift system lets you slide mouse platform left or right over keyboard numeric pad and offers 2 custom height positions Mouse platform tilts forward or backward and adjusts up or down to height of keyboard Mouse platform mounts on left or right side of keyboard