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About product and suppliers:
        Alibaba.com offers 749,916 glass tube products. About 1% of these are quartz tubes, 1% are glass, and 1% are test tube. 

A wide variety of glass tube options are available to you, such as tempered glass, insulated glass, and curved glass. You can also choose from lighting glass, decorative glass, and building glass. As well as from watery glass, lead glass, and optical glass. And whether glass tube is free samples, or paid samples. 

There are 749,916 glass tube suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of glass tube respectively. 

Glass tube products are most popular in North America, Domestic Market, and Western Europe. 

You can ensure product safety by selecting from certified suppliers, including 124,902 with ISO9001, 70,271 with Other, and 12,778 with ISO13485 certification.