Color: Black,Gold ,Silver Fit for Shaft Hole Diameter: 5.5mm/0.24-inch Size:18 x 18mm (D*H) Product Name: Guitar volume knob Material: Metal Quantity:2pcs 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, 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 6mm Diameter Shaft, Volume Control Knob, Audio knob, Guitar KnobElectric Guitar Knobs Package include: 2pcs Knobs Notice: 1.Transition: 1cm=10mm=0.39inch. 2.Please allow 1-2cm error due to manual measurement and make sure you do not mind before ordering. 3.Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you!.