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About product and suppliers:
        Alibaba.com offers 2,401 4 oz copper base products. such as free samples, paid samples. 

There are 2,401 4 oz copper base suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of 4 oz copper base respectively. 

 oz copper base products are most popular in North America, Western Europe, and Northern Europe. 

You can ensure product safety by selecting from certified suppliers, including 205 with Other, 145 with ISO9001, and 56 with ISO14001 certification.
        
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