... Wall Switch Material : PC (high quality than ABS) Contacts:silver alloy Standard :IEC Certificates:CE,ISO,CCC Product NameG7 series- 2 ... lifetime is more than 100000 times.5.Contacts With silver cadmium oxide alloy, have fight arc,resistance to electrical wear, meanwhile ... ,oxidation resisting and the performance is better than pure silver contacts.6.Terminal connecting holes With bigger brass terminal ...