... Zipper, Buckle bright and shining, best choicce for copper layer for hardware 510Acid Copper Brightener for base Layer of Button, Zipper, Buckle ... and high cost effectiveness.5. Especially appliable for copper plating on ferrous, copper alloy, zinc alloy, and aluminous alloy.Bath Components ... , zipper, buckle, get a shining and bright layer of copper. Stable and easy to perate make it best-seller in ...