... could supply you with all kinds of silicon metal like 553, 441,421,411,4105,4405, 3303,2502, 2202, ... their greatest value.Our main products cover: Silicon metal, Pure magnesium metal, Magnesium alloys, Mg powder, Mg butt ... of silicon metal like 553, 441,421,411,4105, 3303,2502, 2202, 1101 etc. Standard of Silicon Metal GradeChemical composition ... available upon customer's request. Silicon Metal 411