(1) MXR Effect pedal control knob 1/4" w/ set Screw blue

(1) MXR Effect pedal control knob 1/4" with set Screw blue

Total height: 11.5mm
Top diameter: 15mm
Base diameter: 20.2mm
Fits 1/4" (6.35mm) solid shaft pots
Attaches with set screw