... thermostat 4,ISO9001,SGS Contact type: rivet/button. According to customers engineer drawing Face material: Solid or bimetal Ag,AgNi,AgCdO, ... AgZnOBase material: Cu, CuNi Normal: 1.0mm-8.0mm, According to customers drawing or samplesilver thickness: 0.15mm-solid Normal: 0.6 ... addition of 3 - 28% copper may remarkably improve the silver's flame resistance. Hence, copper contact material may be used in ...