Features: High-quality metal body, dome shape, wear resistant, durable and not easy to damage. Easy to install and tighten, with smooth, positive rotation. Perfect for electric guitars, it is replacement for your damaged, dirty or old control knobs. Perfect for guitar players who want to customize their sound and enhance their playing experience. The guitar control knob is perfect for most basses and guitars and controls the volume. Specifications: Material: Metal Size: As shown in the picture Note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 3pcs Guitar Dome Knobs