... Glass 4. Plastic A. Material : Rohs compliant material ,for example ,Autotype ,3M ,Nicomatic.B. Dimension : According to ... 's desires ,such water proof ,dust proof and anti corrasion and so on 4. Strick quality inspection ,100 ... Resistance: 10Ω~ 500Ω (Varies from the trace length and material)Insulation Resistance: 100MΩ 100VDielectric: 250 Vrms ( ... ) Membrane Switch with Touch Panel and Bezel for Siemens