Another greeblie for your collection lol.
This is the first one uploaded JUST to the Prusa files.
I wanted something that would look like a connection for tubes/cable. The holes are 5mm dia, but after printing these are more like 4.8mm dia. The cable I'm using is 12 AWG with silicone sleeve, which fits perfectly. I printed two off for testing.
The pictures show, PLA prints at 0.2, as this was a test print.
The author hasn't provided the model origin yet.