... service 4, fast delivery time YOO brand silver metal zipper:We are OEM , and we have different ... materials to make the zippers,for example,the metal,the nylon and the resin. certificate:ISO9001:2000 ... .7 hectares. Our company offers resin, nylon and metal three series of zips of "YOO", "ASA" ... brands, and a variety of styles of metal and plastic buttons, including snap buttons, combined buttons, ...