... %, 99.8% 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 ... or L/C. 99.7% pure Zinc oxide powder, industrial and feed grade