Rotary Switch Selector with KnobProduct Details1.Fit Mounting Hole Diameter: 9.7mm / 0.38inch ; 2.Contact Type : 4Pole 5Position,2Deck; Pin Number : 243.Product Name : Band Selector Rotary Switch4.Rotating Shaft Dia : 6mm / 0.24inch ; Shaft Length : 11.7mm/ 0.46inch5.Comes with mounting nut and black plastic knob, no worry about knob size mismatching.
eBay