Menger Sponge
thingiverse
A Menger sponge:https://en.wikipedia.org/wiki/Menger_sponge You choose the size. You choose how many iterations.
Download Model from thingiverse
With this file you will be able to print Menger Sponge 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 Menger Sponge.