... CE approval OFF-ON switch, Rotary Switch/Cam Switch,Selector Switch 16A, IP20 standard, finger protectionOFF-ON Switch, Rotary Switch/Cam Switch,Selector Switch 16A, IP20 standard ... and buttons:a. Ammeter rotary switch: OFF-R-Y-B, OFF-R-S-Tb. Voltmeter rotary switch: TR-ST-RS-0-RN ... professional manufacturer , specialized in kinds of plug ,socket , switch , etc. we provide OEM and custom made service.