Description:Guitar Effect Pedal Knob Amplifier Control Knobs for Guitar Parts AccessoriesUsed for effect pedals or amplifiers.Great for guitar amp knobs replacement.Can be used for synthesizers, electric guitar,ectPlastic control knob to be assembled to a potentiometer for easier rotation.Please be sure to verify the dimensions before you order the knobs Specification:Material: AluminumKnob Diameter: 13mm / 0.51"Knob Height: 13mm / 0.51"Fits 1/4" (6mm) shaft pots Package Content : 2 Pcs x Knobs