Product Description 100% Brand New Material: Metal Color: Black Silver, Black, Gold(Optional) Knob size: As the picture show Mounting Size: Corresponding to the potentiometer mounting inner diameter of 5mm. Package Content: 4 x Guitar knobs 1 x Hex wrench Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Due to manual measurement, there may be 0.5-1mm error in size.