This kit makes building truss structures and many geometric shapes easy!
It consists of a cuboctahedron node, 3 sizes of pegs, and an optional panel.
You can identify the size of the peg by looking at how many embossed circles are on it:
1 = small
2 = medium
3 = large
NOTE: You can build a Truncated Octahedron but you need to force the geometry a bit.
Don't print supports on the nodes to ensure that the bottom hole isn't filled in with hard to remove support material.
Also, I have found that reducing the first layer width has helped avoid elephant foot which would make the bottom hole opening too small