This is a door handle bumper that slips over either a 19mm or 16mm door handle. The unused hole and middle part will protect the wall or other door from impact from the door handle.

I would have liked to make this a customizable design, but I am a total novice so I really don't know how.

This particular design is mine, but it is loosely based on a similar bumper that has been used in my home for more than 30 years. I have tried to find such a bumper for sale for a long time, but never been successful. Therefore this was one of the first items that I designed and printed once I got my Prusa Mk2S