... 2,Surface Processing:Nickel, Rhodium, Gold, Silver , Anti-brass, Anti-copper. Copper ChainNameCopper ChainMaterial Steel(Iron), Brass, Stainless steel, Colors Nickel, Rhodium ... , Gold, Silver , Anti-brass, Anti-copper, Black nickel/Gun metal, Brass color etc... Made type Machines ... .0mmDelivery ability 3000mtrs/7days Q.C Passed by 3rd part Copper Chain