Check the listing for details. Aluminium Potentiometer Knobs 1/4"x1.5", Volume Tone Control Knobs, Red. Condition: New. Listed at 14.50 USD. What is this?Guitar knobs can be decorated on volume and tone knobs, and are a good DIY product for instrument lovers, suitable for most electric guitars and bass. At the same time, it is also a potentiometer knob, suitable for various electrical equipment, electronic instruments, etc.What will I get?Aluminium Guitar KnobsInner Diameter: 6 mm（1/4 inch)Outer Diameter: 38 mm/1.5 inchHeight: 20.0 mm/0.8 inchColor: RedMaterial: Aluminum AlloyIn the Package: 1 x Guitar Knobs, 1 x WrenchAre there any advantages of the product?These knobs are made of aluminum alloy, not only are guitar volume and tone knobs, but also potentiometer knobs. Very sturdy and durable, good turning feel, long service life, and can be applied to different types of guitars and bass.