This is a 2 Gang low voltage box cover. I designed it to fit the same box that the RACO 2 Gang Square Box Cover fits.
https://www.lowes.com/pd/RACO-2-Gang-Square-Metal-Electrical-Box-Cover/3129183
It's perforated to allow the signal from a Shelly 1 relay module to pass through the box.
Prints with PLA and requires only the same diameter screws included with the RACO cover.
Holes are all 5mm.
The author marked this model as their own original creation.