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About product and suppliers:
        Alibaba.com offers 14,230 38mm carbon products. About 1% of these are water treatment, 1% are carbon, and 1% are filling machines. 

A wide variety of 38mm carbon options are available to you, such as carrier of chemical activator, beverage, and food. You can also choose from coating auxiliary agents, petroleum additives, and electronics chemicals. As well as from free samples, paid samples. 

There are 14,230 38mm carbon suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of 38mm carbon respectively. 

8mm carbon products are most popular in North America, Western Europe, and Domestic Market. 

You can ensure product safety by selecting from certified suppliers, including 2,828 with ISO9001, 1,298 with Other, and 592 with ISO14001 certification.