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