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About product and suppliers:
        Alibaba.com offers 10,619 envelope self seal products. About 1% of these are seals. 

A wide variety of envelope self seal options are available to you, such as plastic, metal. You can also choose from mechanical seal, o ring. As well as from free samples, paid samples. 

There are 10,619 envelope self seal suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of envelope self seal respectively. 

Envelope self seal products are most popular in North America, Domestic Market, and Western Europe. 

You can ensure product safety by selecting from certified suppliers, including 9,617 with ISO9001, 5,319 with ISO14001, and 1,999 with Other certification.