Silver/Copper Contact is in low concentrations increases the mechanical hardness ... Usage:relay,switch,contactor,breaker,thermostat 4,ISO9001,SGSContact Rivets,Solid Rivets,Pure Silver RivetsCertificate ISO 9001:2008, RoHS, SGS, etcMaterialsAgCu, ... by the buyer. Main Specification of our Bimetal Rivets Our Location Our company is very near to Chengdu ... our company. Please do not hesitate to contact us!