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About product and suppliers:
        Alibaba.com offers 38,698 unit tube products. About 6% of these are steel pipes, 1% are led tube lights, and 1% are plastic tubes. 

A wide variety of unit tube options are available to you, such as paper, pe, and pvc. You can also choose from ce, bv, and api. As well as from 10#, 20#, and q195. And whether unit tube is structure pipe, oil pipe, or boiler pipe. 

There are 38,698 unit tube suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of unit tube respectively. 

Unit tube products are most popular in Domestic Market, Eastern Europe, and North America. 

You can ensure product safety by selecting from certified suppliers, including 12,822 with ISO9001, 3,459 with Other, and 2,948 with ISO14001 certification.