Great for Floating Workstations: Adjustable wall-mounted 23.6' x 7' keyboard tray is the perfect addition to a wall monitor mount (sold separately) to create a floating workstation for quick-standing access Pneumatic Spring Lift: The sleek keyboard tray is supported by a powerful pneumatic arm that makes adjustments smooth and simple. Easily raise or lower your keyboard surface a total of 14.5' for a custom setup