Potentiometer knob is suitable for 6mm diameter shaft, used for Volumes, control knob, guitar Volumes tuning knob very enduring, and will not affect the use of your instrument Suitable for easily assembly onto potentiometers, ensuring smoother rotation and enhanced control It is make of ABS, durability, and can be used for a long time Great for upgrade or replacement part. Practical replacement knobs are a great those who need knobs, Manufacturer: PUREFAA