Features: *100% brand new and high quality. *This knob is the perfect replacement when you want to make your guitar or pedal project ! *replacement knob for MXR guitar Pedal. *rich colors. *Material: Plastic *Color: Black,Red,White,Blue,Purple,Green,Brown *The top of the knob: approx. 17.2mm in diameter. *The bottom of the knob: approx. 23.4mm in diameter. *Height: approx. 15.5mm high. *The central hole is approx. 6.35mm in diameter. Package list: 1 x knob Note： Please refer to the measurement. Tiny measuring error is allowable in normal range. There might be a little color difference due to the monitor, camera or other factors, please refer to the physical item.