Feature:1. Easy Adjustment: The control knob allows for easier adjustment on the tone, volume, potentiometer, etc. to meet your needs.2. Higher Accuracy: Ensuring high accuracy in the smoother adjusting, the effect pedal knob can better arrange beautiful melody.3. Good Decoration: Simple in style but pretty in colour, the control knob is also a beautiful decoration for your instrument.4. 4Pcs in the Set: With 4pcs controller knob in the set, which largely simplifies the replacement of old and damaged parts.5. Easy to Install: Comes with a light weight and a compact size as well, the slot designed knob is very convenient to install.Specification:Item Type: Effect Pedal KnobMaterial: PlasticColor: Transparent.Package List:4 xEffect Pedal Knob