Description This professional rotary knob, made of high-quality material, is practical and durable for long lasting use. Corrosion resistance, fine workmanship, no burr. Lightweight, easy to carry and use. Great for potentiometer knobs as well as volume control knobs for sound equipment. Add a nice touch to your device. Features - Color: Golden, Silver, Black. - Material: Plastic, Aluminum alloy. - Size: About 1.70X1.40X1.40cm/0.67X0.55X0.55inch. - Made of premium material, it is sturdy, practical and durable for a long time use. - Designed for potentiometer and sound equipment. - With exquisite workmanship, it has no burrs. - Small and light, easy to carry. Easy to install. - Corrosion resistance, not easy to rust. Great to replace your old or broken knob.