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