Guitar Volume Control Knobs, Guitar Control Knobs, for Guitar Instrument Lovers Specification: Features: 1.Made of high-grade plastic material, wear-resistant, durable for long-lasting use. 2.Adopt fine workmanship and delicate design, smooth surface, will not scratching your guitar. 3.Lightweight, easy to install and use. 4.Perfect used as guitar tone control knobs and volume control knobs. 5.Great replacement for St Sq electric guitar. Specifications: Material: Plastic Optional Color: Green, Purple Mounting Hole Inner Diameter: Approx. 6mm/0.24in Bottom Diameter: Approx. 25.5mm/1in Top Diameter: Approx. 18mm/0.7in Package list: 3 x Guitar Control Knob