Oh say can you see
By the knob's early light...
Sorry - they thought that was clever. And while it wasn't really, this potentiometer knob definitely is. It's a 'soft touch' T18 knob that works great with Adafruit's Panel Mount 10K, Panel Mount 1K, and Panel Mount 100K potentiometers. The knob is designed to set directly on the potentiometer's ridges so it's an easy & secure fit. It has a nice feel, with a rubbery grip, tweaking it is quite fulfilling
This is the Red version and it has a nice deep color on the inside with a striking red line on the outside for great visibility with whatever you're making. Adafruit also carry it in white and blue if you're looking for a variety of colors.
Diameter of the top: 11mm / 0.4"
Diameter of the base: 15mm / 0.6"