These and practical knobs are used for instruments. If your knobs are dirty, old, or just want to dress up your guitar. These knobs will be great replacements. Fine craftsmanship without burrs. Do not hesitate to take them! Features -Color:Black, wine red, grey, blue -Material:ABS, plastic, brass -Size:1.25X1.25X1.45cm/0.49X0.49X0.57in -Bore diameter: 6.40mm (1/4") - Owning the and break resistance ability, very durable. - Great for potentiometer knobs as well as volume control knobs for sound equipment. - The replacement parts of audio equipment, the round shaft can be easily pushed up. - This professional instrument control knob must meet your needs. Convenient to carry, easy to replace when going out. - With the great material and fashionable appearance design, it can meet your using needs well. Package list: 60 x Guitar Amplifier Knobs