We could supply you with all kinds of silicon metal like 553, 441,421,411,4405,4105, 3303 ... end, etc.We could supply you with all kinds of silicon metal like 553, 441,421,411,4405,4105, 3303 ... ,2502, 2202, 1101 etc. Standard of Silicon Metal GradeChemical composition(%) Si(≥)Impurities(≤) FeAlCa 55398.500.500. ... packing forms are available upon customer's request. Silicon Metal 553