As I needed a non-permanent shelf for my MMU2S filament rolls on top of the Prusa Mk3S, I bought a wooden plank and four metallic legs and assembled them in order to put the shelf on my printer's temporary desk.

As I don't want to drill holes or anything on this temporary desk, I designed these small stops. I just use double-sided tape to hold them in place, and it is enough for preventing accidental shoulder bumps on the legs while operating the MMU2S or the RMU.

Of course, it can be used for any other purpose.

Designed for a square foot 24 mm x 24 mm.

Feel free to remix to other dimensions and to add holes for screws if you want. It is Public Domain.