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About product and suppliers:
        Alibaba.com offers 8,872 large glass tube products. About 17% of these are quartz tubes, 7% are glass, and 1% are test tube. 

A wide variety of large glass tube options are available to you, such as clear quartz pipe, insulated glass, and opaque quartz pipe. You can also choose from polished, grinded, and gold coated. As well as from one end closed quartz tube, c shape, and twin tube. And whether large glass tube is ozone free, or high ozone. 

There are 8,889 large glass tube suppliers, mainly located in Asia. The top supplying countries are China (Mainland), India, and Australia, which supply 99%, 1%, and 1% of large glass tube respectively. 

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

You can ensure product safety by selecting from certified suppliers, including 2,879 with ISO9001, 828 with ISO14001, and 780 with OHSAS18001 certification.