... the biggest manufacturer and very famous in China. 1.material (Silicone) 2.Adhesive 3M A. Material : Rohs compliant material ,for example ... ,such as membrane switch and touch screen with FPC, PCB ,silicone rubber ,metal backer ,plastic bezel and so on. 6. We ... ~200Hz,Mil-SLD-202,M204.Condition B) OEM Silicon Rubber keyboard Membrane Switch