Website: thingiverse
Author: cantrollmyrs
Price: Free Download
File format: .Stl 3d printable
Description:
A way to print out a mannhole cover without having to travel to Berlin. Similar to how they make it here: https://www.youtube.com/watch?v=0iJ0bNWRZH0Just print this out and use some screen printing ink to get a cool shirt pattern