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About product and suppliers:
        Alibaba.com offers 13,577 38mm carbon products. About 16% of these are bicycle wheel, 4% are mining machinery parts, and 2% are bicycle frame. 

A wide variety of 38mm carbon options are available to you, such as carbon steel, carbon, and metal. You can also choose from carrier of chemical activator, fence mesh. As well as from free samples, paid samples. 

There are 13,577 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 South America. 

You can ensure product safety by selecting from certified suppliers, including 2,959 with ISO9001, 941 with Other, and 519 with ISO14001 certification.