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About product and suppliers:
        Alibaba.com offers 1,581 waterproof post box products. About 35% of these are mailboxes, 1% are packaging boxes. 

A wide variety of waterproof post box options are available to you, such as apartment, postal service, and garden. You can also choose from stainless steel, aluminum, and metal. As well as from free samples, paid samples. 

There are 1,584 waterproof post box suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Japan, and Taiwan, which supply 99%, 1%, and 1% of waterproof post box respectively. 

Waterproof post box products are most popular in North America, Western Europe, and Northern Europe. 

You can ensure product safety by selecting from certified suppliers, including 360 with ISO9001, 183 with ISO14001, and 72 with Other certification.