... thermostat 4,ISO9001,SGS Contact type: rivet/button. According to customers engineer drawing Face material: Solid or bimetal Ag,AgNi,AgCdO,AgSnO2 ... material: Cu, CuNi Normal: 1.0mm-8.0mm, According to customers drawing or samplesilver thickness: 0.15mm-solid Normal: 0.6- ... 4.0mm Other: according to customers requirementSilver rivet and Ag/Cu ...