... One way zipper. Good performance in teeth strength. Ideal for shoes fastering. Shoe Zipper1.Material: Alumium, Copper, Brass etc.2.Size ... Color Available: Shinny Silver, Shinny Gold, Antique Brass, Antique Silver, Light Gold, Rose Gold, Shinny Antique Brass, Shinny Black Nickel, Crystal ... Material are available.8. Certificate of Quality: SGS, INTERTEX 5# Shoes Zipper Gun Metal