This is a rotary control knob made of , sturdy and durable to use. High-end appearance design, it is applicable for electric bass, electric guitar, potentiometer, etc. Perfect volume and tone control knobs for them. Come and take it home! Features - Color: Green -Material:Plastic, metal - Size: 1.80X1.80X1.80cm/0.71X0.71X0.71in -Selected , which is not easy to deform or break, the guitar knob is durable and practical. -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 . -The product design comes with simple structure, and easy to install, and will not affect the use of your instrument. -Perfect used as guitar tone control knobs and volume control knobs. Great guitar accessory for guitar players. Package list: 9 x knobs 3 x wrench