Check the listing for details. 44.5x19mm Top Potentiometer Silver for Volume Tone Control Rotary Knobs,2pcs. Condition: New. Listed at 13.36 USD. Control KnobsWhy Choose This:★Electronic Control Potentiometer Knob For 6mm Diameter Shaft,Volume Control Knob, Audio knob, Guitar Knob，Electric Guitar Knobs，Encoder Code Switch Knobs★Material: plastic, durable, exquisite workmanship, easy to carry and use.★Size:44.5x19mm /1.75'' x 0.75''(D*H);Fit for Shaft Hole Diameter:6mm/0.24'';Package Content: 2 Pcs x Potentiometer Rotary Knob★360 degree rotary knob for easily control the potentiometer.Easily adjust,widely applied to control the effect of a variety of functions, such as level, speed, voice, etc.Can be used for synthesizers, electric guitars, etc.★Note：In order to make the rod and knob sleeve tighter, the actual hole diameter will be slightly less than 6mm. When using, you need to push the knob hard.