I got the granite as part of the flow kit with my desk order, but I would definitely recommend ordering separately even if you don't choose this option. Very easy to attach to the desk with just two screws and it hooks securely into the rail. The magnetic grip is strong and you can easily attach power cords/chargers and run them up to the top of the desk, which is definitely a big space saver. Overall, fits with the aesthetic of the desk and looks great when sitting or raised to standing position.