zinc oxide for feed grade, we have the production license and approval number for feed grade. And we are the leading company who produce zinc oxide for feed grade in China. The main purity for feed grade contain 90%,95%,98%,99%,99.5% etc and as metal Zn is 72%,75%,78%,79%,80%.,We also can export ourselves, we have exported to many foreign countries, just like Canada ,UK, USA, South America and so on.