This simple model acts as a drop-in replacement for the support/tension/prop bungs on the Givi Monolock topbox plates. Unfortunately I lost one of mine, but by measuring one of the others I was able to print a replacement.
Personally I printed mine in PLA and it did fine as a ‘hard’ mount with a bit of electrical tape on top. I'm sure if printed in TPU or something similar it would be just like the original. They're only tension spacers anyway, to stop a topbox jiggling a little too freely.
The author hasn't provided the model origin yet.