A little ring that reinforces broken knobs, like the oven ones. As I don't know how to make customizable things, i will upload the Fusion file for now.

The .stl is 9.5mm inner diameter, 13.5 outer and 6mm in height.

Print Settings

Resolution: 

0.2 - 0.3

Infill:

25

Filament:

Sunlu PETG 

Black

Notes:

There is little surface to stick it, a brim or raft is recomended.