25kg/bag Purity 80%,85%,90%,92%,95%,96%, 97%,98%,99%,99.5%, 99.7%, 99.8% to 99.9% ... feed gradeIndustrial grade:80%,85%,90%,92%,95%,96%, 97%,98%,99%,99.5%, 99.7%, 99.8%, 99.9%Feed ... : T/T as sight or L/C. 99.7% pure Zinc oxide powder, industrial and feed grade