Description: [Connnect] The circuit is connect to the input and the output of your Volumes potentiometer. [Feature] Noise reduction capacitance,Effective elimination of noise Make your guitar tone clearer and beautiful. [Application] The Volumes knobs does not alter the tone when the Volumes is lowered.Works with Humbuckers but can be used for Single Coil as well. [Function] It prevents loss of highly frequency when turnings down Volumes when installed between hot in and outs of your guitar's Volumes. [High Frequencies Compensation Capacitor] This product also features a high frequencies compensation capacitor which helps in filtering out unwanted noise and interference, ensuring clear and crisp sound output from your electric guitar. Specification: Material: Metal Size Chart: 331J: 2.7cm/1.06inch for for Sbe AD: 3cm/1.18inch Package Includes: 1 Guitar Volume Potentiometer(4 Pack) Note: Please allow slightly errors 1-2cm differences due to manual measurement.