This is a mail holder I made to avoid putting mail down on my kitchen island. It has a few magnetic inlay spots so you can stick small rare earth magnets on the back. You can also use Velcro too which also works well.
I'd suggest PLA with a high layer height as it'll be best for bridging and given this is just a mail holder it doesn't need to have super high quality.
The author hasn't provided the model origin yet.