... with all kinds of silicon metal like 553, 441,421,411,4105,4405, 3303,2502, 2202, 1101 etc. We are devoted ... with all kinds of silicon metal like 553, 441,421,411,4105, 3303,2502, 2202, 1101 etc. Standard of Silicon Metal ... packing forms are available upon customer's request. Silicon Metal 411