We could supply you with all kinds of silicon metal like 553, 441,421,411,4405,4105, 3303, ... butt 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 ...