Multiple available. Secure with a grub screw so ideally for smooth shaft pots. 33mm on the bottom, top bit is slightly smaller.
33mm Bright White knob mushroom pointer 6.35mm amplifier radio control style
Red brown big knob klon pointer control barrel 6mm vintage style screw oxblood
Brown red amplifier radio control knob pointer Neve Marconi API style oxblood
15.5mm red knob small volume amp amplifier radio control grub screw fixing
Fender Red Knob Champ 12 Tube Amplifier, with orig Footswitch .
Solid Wood Kazoo in Brown Red Rosewood Flute Shaped for Classes
