The Adjustable Keyboard Platform With Swivel Mouse Tray, model 2135BL, is an adjustable height keyboard and mouse tray designed to provide keyboard access at a comfortable height. Made from medium density fiberboard, this keyboard platform tucks away under the desk when not in use. A swivel mouse tray can be mounted on the left or right. A single knob provides height and tilt adjustment. A foam wrist rest with vinyl cover is included. The platform adjusts 5 inches, from 1.5 inches above the desk to 3.5 inches below the desk, rotates 360 degrees, and tilts from plus 10 to minus 15 degrees. Steel mounting hardware is inncluded. DIMENSIONS (HxDxW): Keybaord platform is 0.38 x 9.5 x 18.5 inches and the mouse platform is 7.75 inches in diameter x 0.25 inches high. WEIGHT: 9 pounds. COLOR: Black.