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About product and suppliers:
        Alibaba.com offers 4,567 3d closure products. About 1% of these are hair extension. 

A wide variety of 3d closure options are available to you, such as free samples, paid samples. 

There are 4,615 3d closure suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Pakistan, and India, which supply 98%, 1%, and 1% of 3d closure respectively. 

d closure products are most popular in North America, Western Europe, and Eastern Europe. 

You can ensure product safety by selecting from certified suppliers, including 1,527 with Other, 502 with ISO9001, and 90 with BSCI certification.