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About product and suppliers:
        Alibaba.com offers 3,612 grade sole products. About 1% of these are organic acid, 1% are alcohol & hydroxybenzene & ether, and 1% are hair extension. 

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

There are 3,612 grade sole suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of grade sole respectively. 

Grade sole products are most popular in North America, Western Europe, and Domestic Market. 

You can ensure product safety by selecting from certified suppliers, including 693 with ISO9001, 176 with BSCI, and 145 with Other certification.