String Instruments Accessories -Bass Guitar Key Dome Control Knob Highlights Generic Brand Bass Guitar Key Dome Control Knob Description: Made of metal material, anti-aging, anti-rust, durable for long time use. 3 knobs with hole, great replacement part for your guitar. With a small key in the package, convenient to use. Ideal for electric guitar and bass. Perfect for professional guitarists and guitar enthusiasts. Specification: Material: Metal Color: Black Size Chart: Diameter: Approx. 18mm/0.71inch, Height: 19mm/0.75inch Package Include: 3pcs Guitar Control Knobs 1pcs Wrench Note: Please allow 1-3mm measurement deviation due to manual measurement . Due to the different monitor and light effect, the actual color of the item may be slightly different from the color showed on the pictures.