Check the listing for details. Black Metal Guitar Control Knobs - Volume/Tone Dome Knobs (Set of 3). Color: Black, Condition: New. Listed at 10.43 USD. SIZE: About 19mm; Total height: about 18mm; The bottom central hole is about 6mm which can fit most metric pots with diameter less than 6mm, may not fit 1/4" American shaft pots.HIGH QUALITY: Adopting metal material, the volume knob is durable and anti-corrosion.PACKAGE INCLUDES: 3 * Guitar Knobs, 1 * Wrench.Widely used to control the volume of electric guitar and bass circuit board.Used to replace the dirty, dingy and old knob. It is durable and practical. Product Description Are you looking for a professional, yet affordable guitar control knob? Are you in search of a sturdy, trustworthy tool that can do multiple jobs at once? If yes, look no further! Our professional guitar control knob must meet your needs. It is suitable for guitar lovers. - Used to replace the dirty, dingy, and old knob. It is durable and practical. - Great replacement parts for electric guitar and bass. - Adopting metal material, the volume knob is durable and anti-corrosion. - Easy to use and easy to install. Metal Flat Top Control knobs for Electric Guitars. These knobs are made from solid steel and are suitable for most electric guitars. A simple grub screw on the side of the knob is used to secure the knob in place. 3 x guitar control knob 3 x wrench - Color: Black. - Size: 19*18*6mm - Material: Metal & steel.