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About product and suppliers:
        Alibaba.com offers 17,886 big middle products. About 1% of these are hair extension. 

A wide variety of big middle options are available to you, such as free samples, paid samples. 

There are 17,796 big middle suppliers, mainly located in Asia. The top supplying countries or regions are China, India, and Vietnam, which supply 99%, 1%, and 1% of big middle respectively. 

Big middle products are most popular in North America, Western Europe, and South America. 

You can ensure product safety by selecting from certified suppliers, including 2,453 with ISO9001, 1,633 with Other, and 543 with ISO14001 certification.