... diemeter: 8MM;contact: sillver with goldplating.2. operation: auto-reser and auto-lock;3.contact structure: single-throw (1NO+1NC)4 ... indicator lamp, push button switch with lamp push button switch, selector switch, with lamp selector switch, key switch, double push button switch, emergency stop switch, buzzer, accessory and ... 16mm,22mm,25mm; 8mm small momentary illuminated push button switch