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