I wanted a cover to keep the pliers included in the MK3S kit closed (since they are spring-loaded and are normally open). This is a simple cover to slide over the end of the pliers!
Also included a STEP file for easy remixing.
I printed in vase mode with Inland PLA filament, but any kind of filament should work for this. It prints in about 15 minutes using a 0.20 mm layer height. Print as oriented with the nose on the build plate.
To enable vase mode in Prusa Slicer, go to Print Settings, Layers and perimeters, and then check the box for "Spiral vase" and click Yes on the dialog that pops up to change other settings.
The author hasn't provided the model origin yet.