DAIERBUMP 10PCS Black MXR Style Skirted AMP Knob 635MM Guitar Potentiometer Knobs Brass Insert For Guitar Effect Pedal Knobs DAIERBUMP 10PCS Black MXR Style Skirted AMP Knob 6.35MM Guitar Potentiometer Knobs Brass Insert For Guitar Effect Pedal Knob About this item Guitar Amplifier or Effect Pedal Knobs,Set of 10 Dimension: 11.4mm (height) x 14.8mm (Top diameter) x 20mm (Base diameter); Made of plastic with Set screw and Brass Insert; Fits 1/4" (6.35mm) diameter shaft pots or any other pots which diameter less than 1/4" (6.35mm) Can also be used to replace the volume/tone control on a Jazz Bass These use set screws so be careful about using them on split shaft pots Please be sure to verify the dimensions before you order the knob _x000D_