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About product and suppliers:
        Alibaba.com offers 883 20mm led message products. such as free samples, paid samples. 

There are 872 20mm led message suppliers, mainly located in Asia. The top supplying countries or regions are China, United States, and India, which supply 98%, 1%, and 1% of 20mm led message respectively. 

0mm led message products are most popular in North America, South America, and Western Europe. 

You can ensure product safety by selecting from certified suppliers, including 248 with ISO9001, 61 with ISO14001, and 49 with Other certification.