Well, okay, a pipe is not a cube 😉

The hole is hexagonal, 5 mm, made for the cord of my hoodie. 
Inside, as an experiment, I created something like a spring.

The bricks and the question block I printed in 2 colors, and I added the 3MF profile.

In the 3MF profile, the file with the question block is different from the separate STL file attached here.

Easy to print, no supports ✅

Personal use only⚠
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