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About product and suppliers:
        Alibaba.com offers 1,737 #613 4x4 closure products. About 81% of these are hair extension. 

A wide variety of #613 4x4 closure options are available to you, such as free samples, paid samples. 

There are 1,737 #613 4x4 closure suppliers, mainly located in Asia. The top supplying countries or regions are China, Vietnam, and Hong Kong S.A.R., which supply 99%, 1%, and 1% of #613 4x4 closure respectively. 

613 4x4 closure products are most popular in North America, Africa, and Western Europe. 

You can ensure product safety by selecting from certified suppliers, including 82 with Other, 59 with ISO9001 certification.