The file 'Borromean Bangles 3D Printer Model' is (stl) file type, size is 2.5MB.
These bangles are printed in an single run and form the Borromean ring pattern. In case you didn't know the Borromean rings (named after the family whose coat of arms bears the symbol) have the unique property that no two rings are interlocking.
Check out Vi Harts video on Borromean rings here:
https://www.youtube.com/watch?v=heKK95DAKms
UPDATE
We uploaded a new file that prints easier and is more uniform.
borromean1.stl | 4.6MB | |
borromean_rings.stl | 225.7KB | |
borrowmean_rings_smooth.stl | 1.3MB |