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About product and suppliers:
        Alibaba.com offers 525 4th gen products. such as free samples, paid samples. 

There are 539 4th gen suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Taiwan, and Malaysia, which supply 97%, 1%, and 1% of 4th gen respectively. 

th gen products are most popular in North America, Western Europe, and Domestic Market. 

You can ensure product safety by selecting from certified suppliers, including 212 with ISO9001, 26 with ISO14001, and 14 with Other certification.
        
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