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About product and suppliers:
        Alibaba.com offers 1,971 vent tube products. About 5% of these are hvac systems & parts, 4% are injection & puncture instrument, and 2% are plastic tubes. 

A wide variety of vent tube options are available to you, such as 10#, 45#, and q195. You can also choose from pvc, plastic, and pe. As well as from structure pipe, oil pipe, and gas pipe. And whether vent tube is hot rolled, erw, or saw. 

There are 1,988 vent tube suppliers, mainly located in Asia. The top supplying countries are China (Mainland), India, and Pakistan, which supply 99%, 1%, and 1% of vent tube respectively. 

Vent tube products are most popular in North America, Western Europe, and South America. 

You can ensure product safety by selecting from certified suppliers, including 556 with ISO9001, 222 with Other, and 161 with ISO13485 certification.