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About product and suppliers:
        Alibaba.com offers 2,822 envelope air mail products. About 1% of these are packaging boxes, 1% are air freight. 

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

There are 2,822 envelope air mail suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of envelope air mail respectively. 

Envelope air mail products are most popular in North America, Domestic Market, and Eastern Europe. 

You can ensure product safety by selecting from certified suppliers, including 2,270 with ISO9001, 1,304 with ISO14001, and 368 with Other certification.