Descriptions:1.Rotary Knob is useful for connect the rotary Potentiometer, usually multiturn linear potentiometer which always use as volume control switch.2.Replacement part for audio device, D type 6mm round shaft can be push on it easily.3.360 degree rotary knob for easily control the potentiometer.4.Electronic Control Potentiometer Knob For D type 6mm Diameter Shaft, Volume Control Knob, Audio knob, Guitar Knob,Electric Guitar Knobs Features:Product Name: Guitar volume knobColor: Blue WhiteMaterial: plasticFit for Shaft Hole Diameter: D type 6mm/0.24-inchSize: 10x17mm (D*H) Package Content:10Pcs x Guitar volume knob