The Bud Industries SA-1775-BT stationary keyboard/mouse shelf is constructed of heavy gauge steel and mounts to any 19" or 23" panel width open rack. It comes with an integrated 9.00" x 7.00" mouse tray that can be bolted on to either the left or right hand side of the shelf and takes up 1-U (1.75") of panel space. Finish: Black Texture powder coating. Includes all mounting hardware.