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About product and suppliers:
        Alibaba.com offers 127,442 stem products. About 1% of these are other toys & hobbies, 1% are bicycle stem, and 1% are other electronic components. 

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

There are 124,026 stem suppliers, mainly located in Asia. The top supplying countries are China (Mainland), India, and Taiwan, which supply 93%, 2%, and 1% of stem respectively. 

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

You can ensure product safety by selecting from certified suppliers, including 24,260 with ISO9001, 18,266 with Other, and 3,612 with HACCP certification.