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About product and suppliers:
        Alibaba.com offers 1,172 si 421 products. About 92% of these are other metals & metal products. 

A wide variety of si 421 options are available to you, 

There are 1,172 si 421 suppliers, mainly located in Asia. The top supplying country or region is China, which supply 100% of si 421 respectively. 

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