Print at about 0.2mm layer height
PLA recommended, PETG works fine too but the stringing might be more noticable
If you experience issues that the hanger-ring is lost during slicing, activate “Detect thin walls” in “Print Settings” - “Layers and perimeters". Note that this setting is only visible if you are at least set to “Advanced” in the top right corner.
The author hasn't provided the model origin yet.