This is a replacement fader knob for a Behringer X32. The originals come off very easily and replacements seem expensive for a piece of plastic.
These print well on their side with slow bridging. I printed them at highest detail in silver PLA and got a nice match with the originals. If you print them with the bottom down, you'll probably want to exclude support from the center trough that attaches to the mixer, or it will be difficult to remove all the support.
The author marked this model as their own original creation.