Specifications High carbon ferro manganese: 1) MN: 75% (min.) 2) C: 7% (max.) 3) SI: 1.5% (max.) 4) P: 0.25%max High carbon ferro manganese: 1) MN: 75% (min.) 2) C: 7% (max.) 3) SI: 1.5% (max.) 4) P: 0.25% (max.) 5) S: 0.03% (max.) 6) Size: 10-50mm / 10-60mm / 10-100mm 90% (min.) Medium carbon ferro manganese (type 1) 1) MN: 75% (min.) 2) C: 2.0% (max.) 3) SI: 2.0% (max.) 4) P: 0.3% (max.) 5) S: 0.03% (max.) 6) Size: 10-50mm / 10-60mm / 10-100mm 90% (min.) Medium carbon ferro manganese (type 2): 1) MN: 78% (min.) 2) C: 1.5% (max.) 3) SI: 2.0% (max.) 4) P: 0.3% (max.) 5) S: 0.03% (max.) 6) Size: 10-50mm / 10-60mm / 10-100mm 90% (min.) Medium carbon ferro manganese (type 3): 1) MN: 78% (min.) 2) C: 2.0% (max.) 3) SI: 2.0% (max.) 4) P: 0.3% (max.) 5) S: 0.03% (max.) 6) Size: 10-50mm / 10-60mm / 10-100mm 90% (min.) If you are interest in good and consistent quality about our products, kindly please advise.