Blank D20 with instructions
thingiverse
Here are instructions on how to make this D20 https://www.instructables.com/CAD-a-D20/
Download Model from thingiverse
With this file you will be able to print Blank D20 with instructions 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 Blank D20 with instructions.