Item Type: Guitar Control Knobs_x000D_ Material: Plastic_x000D_ Color: Black_x000D_ Maximum Diameter: Approx. 25mm / 1in_x000D_ Height: Approx. 13.2mm / 0.5in 1Made of plastic material, wear?resistant and durable, not easy to deform after long time use. 2The kit contains 2 tone adjustment knobs and a volume adjustment knob, easy to install and replace. 3There are clear letters and numbers on these knobs, so you can distinguish and accurately control the volume and tone of the guitar. 4The outside of the knob has a knurled design, which makes it easy to rotate and not easy to slip. 5Small and compact, easy to install, suitable for replacement of old or damaged guitar or bass knobs.1 x Volume Control Knob 2 x ToneControl Knob