16mm Amplifier Dial Knobs - Black / White - 6.4mm hole 1/4" Shaft - Amp Volume

Shaft FixingGrub Screw. Round Hole Knobs. Shaft TypeRound. Minimum Shaft Depth6.8mm. Maximum Shaft Depth10.1mm. Rubber Soft Grip Vibrant Colour Body Mixer Knobs. Hole Size6.4mm. Splined Hole Knobs.

eBay