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About product and suppliers:
        Alibaba.com offers 3,292 grain waves products. About 29% of these are hair extension, 1% are wigs. 

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

There are 3,321 grain waves suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Vietnam, and Malaysia, which supply 99%, 1%, and 1% of grain waves respectively. 

Grain waves products are most popular in North America, Western Europe, and Africa. 

You can ensure product safety by selecting from certified suppliers, including 633 with ISO9001, 408 with Other, and 270 with FSC certification.