... % to 99.9% industrial and feed grade various purity via high productivitydirect and indirect method both availableindustrial and feed gradeIndustrial grade:80%,85%,90%,92 ... %,95%,96%, 97%,98%,99%,99.5%, 99.7%, 99.8%, 99.9%Feed grade ... or L/C. 99.7% pure Zinc oxide powder, industrial and feed grade