knob - 6mm shaft with flat edge - 40.25mm overall diameter (BONECO S200 - replacement knob to block out light)

Dial knob can be used for anything with 6mm shaft and flat edge (most common)
40.25mm diameter

This is a replacement knob for the BONECO S200 humidifier
It's a great little humidifier, no smartness to it, so I can control it from a wall switch and home assistant, but the dial light is too annoying at night, like a laser show.

So I redesigned it to be a direct swap and block or diffuse the light depending on the filament.
Print with a dark colored filament to block out the light.

Or print the two part version white on the outside and black inside