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About product and suppliers:
        Alibaba.com offers 52,989 tube hard products. About 2% of these are plastic tubes, 1% are packaging tubes, and 1% are stainless steel pipes. 

A wide variety of tube hard options are available to you, such as 20#, a53(a,b), and 10#. You can also choose from structure pipe, fluid pipe, and hydraulic pipe. As well as from api, jis, and astm. And whether tube hard is hot rolled, cold rolled, or erw. 

There are 52,989 tube hard suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of tube hard respectively. 

Tube hard products are most popular in Domestic Market, Southeast Asia, and South Asia. 

You can ensure product safety by selecting from certified suppliers, including 8,820 with ISO9001, 3,636 with Other, and 1,723 with ISO14001 certification.