... kinds of materials to make the zippers,for example,the metal,the nylon and the resin. certificate:ISO9001 ... .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, ... to bulid a long-term friendly relationship with you! metal zipper slider with puller