Electrolytic manganese metal powder chemical composition content of greater than 99.7%: manganese; carbon of less than 0.04%; sulfur of less than 0.05%; p less than 0.005%; iron + Se + silicon is less than 0.205%;

The size of conventional: routine: head - 40 to + 325, + 40 1%max-325 18%max, also based on the user's special requirements for students