Bakelite Barrel Control Knobs These are hard, thermoset plastic knobs, just like they made back in the earliest days of amplification. Use for your bass guitar, amps, and effects pedals. The diameter of the knob is .90", and the height is .675" and has a 1/4" pot shaft hole with a set screw. These can be used on 6mm shaft pots as well with the use of a brass insert.
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