... )Material:Steel 2)Plated:Nickel, Tin, Zinc,Silver, Gold,etc 3)Professional service 4)Hight quality Description of our Spring Battery Connector With Zinc Plated: 1 ... metal like copper, brass, aluminum ,stainless steel, cupronickel, bronze, tinplate, etc 4)Surface treatment: electro-plated, printed, carved, etc, based on client ...