1 Ceramic DIY KNOB-set
+24 K gold
This knob can be fit to any potentiometer pin of your synthesizer/pedal/amplifier or even a small bolt.
The package comes with small (bio)plastic balls which can be kneaded to a putty which makes it fit to an existing pin.
The how to of this is included and easy to follow.
Inner size of this knob is 10 mm.