... auto assembly. Auto Part 1: material: Copper, Brass, Bronze, CuSn, CuNi, Ni, CuNiZn, Monel, rivet material: solid silver alloy contacts and bimetal ... auto stamping and riveting assembly system.6: Surface finishes: Nickel/silver/gold plating. Polishing7: Products range: wall switch, relay, breaker, thermostat ...