Metal Zipper One way zipper. Good performance in teeth strength. Ideal ... for shoes fasterner. 1.Material: Alumium, Copper, Brass etc.2.Size Availiable: 3#, 4#, 5 ... Black Nickel, Crystal Pearl, Black Pearl, Coffee Gold......5.Type Available: Long chain, C/E, O/E, ... available.9. Certificate of Quality: SGS, INTERTEX 5# Y Teeth One Way Zipper/Shoe zipper