Internal Corner Guard or Corner Liner
thingiverse
These can be used to cover the corner of a wall around the edges, whether you would like to add color to your wall or to have them on there for safety.USING AS CORNER GUARD RECCOMENDATION: I think the best option if it is being used to make wall corner safer is to use TPU filament, and give it 10% infill, this will give it a nice squishy structure to absorb some impact.
Download Model from thingiverse
With this file you will be able to print Internal Corner Guard or Corner Liner with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Internal Corner Guard or Corner Liner.