... .material (PE) 2.3M 467 3 Kingbright LED 4.Berg Connector A. Material : Rohs compliant material ,for example ,Autotype ,3M ,Nicomatic ... assembly,such as membrane switch and touch screen with FPC, PCB ,silicone rubber ,metal backer ,plastic bezel and so on. 6 ... B) LED Membrane Switch Keyboard With Metal Dome and Berg Connector