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About product and suppliers:
        Alibaba.com offers 70,567 20mm glass products. About 5% of these are building glass, 4% are bottles, and 1% are glass. 

A wide variety of 20mm glass options are available to you, such as clear glass, laminated glass, and tempered glass. You can also choose from bulletproof glass, decorative glass, and acid etched glass. As well as from float glass, sheet glass, and glass block. And whether 20mm glass is curve, or flat. 

There are 70,342 20mm glass suppliers, mainly located in Asia. The top supplying countries are China (Mainland), India, and Taiwan, which supply 99%, 1%, and 1% of 20mm glass respectively. 

0mm glass products are most popular in North America, Western Europe, and Domestic Market. 

You can ensure product safety by selecting from certified suppliers, including 19,112 with ISO9001, 10,668 with Other, and 4,218 with ISO14001 certification.