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About product and suppliers:
        Alibaba.com offers 65,917 letter box products. About 6% of these are mailboxes, 1% are packaging boxes, and 1% are machining. 

A wide variety of letter box options are available to you, such as metal, stainless steel, and aluminum. You can also choose from free samples, paid samples. 

There are 65,694 letter box suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Thailand, and Kenya, which supply 95%, 1%, and 1% of letter box respectively. 

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

You can ensure product safety by selecting from certified suppliers, including 10,286 with ISO9001, 6,060 with Other, and 2,930 with ISO14001 certification.