Metal zippers have been around quite a while. In fact, the first zippers were made of metal back in 1893. Metal zippers are available in four different finishes:
Aluminum Chain that is constructed principally from aluminum.
Brass Chain that is constructed of brass, typically a combination of copper and zinc.
Antique Brass Chain made from brass that is chemically treated to give the appearance of worn or tarnished brass.
Black Oxidized Chain made from brass that is chemically treated to a black matte finish.
Metal Zipper, Metal Zipper Pulls, Heavy Duty Metal Zippers, Fancy Metal Zipper
BAODA FASHION ACCESSORIES CO.,LTD , http://www.cnbaoda.com