This is a simpel but working knob for a light dimmer.
The original was broken, so I needed a new one.

Dimensions: Height 15 mm, Diameter 40 mm.

In the middle at the back of the knob there is a special grip for the pin of the dimmer. You can find these kind of dimmers at the store: gamma/praxis in the Netherlands

tip: turn the knob 180 degree on the y-as. so you don't use support material.