... different kinds of materials to make the stopper,for example,the metal and the resin.certificate:ISO9001:2008Excellent ... .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, ... a long-term friendly relationship with you! metal stopper for garments