Product Name : Band Selector Rotary Switch. Contact Type : 3Pole 6Position, 3Deck; Pin Number : 21. Fit Mounting Hole Diameter: 9.7mm / 0.38inch ;. Rotating Shaft Dia : 6mm / 0.24inch ; Shaft Length : 11.7mm/ 0.46inch. Comes with mounting nut and black plastic knob, no worry about knob size mismatching.
