Ergonomic Keyboard and Mouse Tray: Installs underneath a standard desk for comfortable typing angles --Patent Pending-- Compatibility: If installing to a height adjustable desk, you will need a spacer bracket for the track to fit over the frame crossbar. Search for adapter MOUNT-SPACER01 (not included) for this purpose Deluxe Universal 25" x 10" Tray: Fits most keyboards and mice. The keyboard slides forward and back on a 14.25" long and 6.25" wide track (will need 14.25" between the desktop edge and crossbar). Minimum recommended desktop thickness is 5/8" Enhance Posture: Reduce wrist soreness with supportive rubber padding, full side to side rotations, and 5" height adjustment Simple Assembly Process: All mounting hardware is included for fast and easy assembly. The total tray weight is 10 lbs. Please be sure your desk can support this under-mounted weight Enhance your typing posture with the Vintage Brown Under Desk Keyboard Tray (MOUNT-KB03N) from VIVO! An adjustable and convenient workflow is ideal and easy on the body as you type at a more ergonomic position. When not in use, simply slide the tray under the desk and out of the way. This sturdy product comes in a vintage brown finish to complement a variety of desks on the market and provide a modern appearance. The sleek metal track is low profile and slides under the desk when not in use. Getting your keyboard tray set up is a breeze, and we provide all the hardware for under-desk mounting.