... , 11, 12 positions5. 1, 2, 3, 4, 5, 6 stage with many different panels and buttons:a. Ammeter rotary switch: OFF-R-Y ... -B, OFF-R-S-Tb. Voltmeter rotary switch: TR ... -11 1-2-3-4-5-6-7-8-9-10-11-12We are professional manufacturer , specialized in kinds of plug ,socket , switch , etc ...