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About product and suppliers:
        Alibaba.com offers 7,440 value chain products. About 57% of these are sea freight, 26% are air freight, and 5% are freight agents. 

A wide variety of value chain options are available to you, such as iron, alloy, and stainless steel. You can also choose from free samples, paid samples. 

There are 7,399 value chain suppliers, mainly located in Asia. The top supplying countries are China (Mainland), India, and Taiwan, which supply 98%, 1%, and 1% of value chain respectively. 

Value chain products are most popular in North America, Western Europe, and Mid East. 

You can ensure product safety by selecting from certified suppliers, including 1,797 with Other, 128 with ISO9001, and 9 with ISO14001 certification.