Description These professional rotary knobs are made of high-grade material which is practical and durable for long-lasting use. Corrosion resistance, fine workmanship, no burrs. Light weight, easy to carry and use. Great for potentiometer knobs as well as volume control knobs for sound equipment. Features -Color:Light Brown-Material:Plastic-Size:2.50X2.50X1.39cm/0.98X0.98X0.55in- Easy to install, they are not easy to age, solid material, very durable and anti-corrosive. - The potentiometer knob is used to connect a rotary potentiometer and is usually used as a volume control switch. - The guitar volume knob comes with scale, which allows you to adjust it easily and quickly.- This product can be given as a gift to friends who own a guitar, they will need it.- With simple structure, these guitar volume knobs are very easy and convenient for you to install and remove. Packing list: 4 x guitar knobs