... : 500000 Piece/Pieces Specifications Item no SA2686Size 21 mm Material Zinc alloyColor gold, antique gold, silver, antique silver, chrome, anti-brass ... , silk screen printing, etc QC Salt fog test Acid resistance,Alkali resistance test Tensile testsCertificate GSG, ISO2001:9000, ISO2004:9000 Packing ... you have any question , contact me. Thank you ! Sap2124 Classic Zinc Alloy Zipper Slider