Under desk mount for the Focusrite Scarlett Solo 4th Gen. (note: 3rd gen and 4th gen are different sizes, 4th gen is bigger so this will not fit the 3rd gen)
Designed to not require supports, to allow this it should be printed on one of the open ends. It is equally sized so the unit can go either way around. To attach it to the desk it has countersunk holes to take standard wood screws with larger holes on the opposite face to make screwing the screws in easier.
The author marked this model as their own original creation.