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About product and suppliers:
            15,821 china black rectangular hollow products are offered for sale by suppliers on Alibaba.com, of which steel pipes accounts for 95%, aluminum pipes accounts for 1%. 

A wide variety of china black rectangular hollow options are available to you, such as erw, cold rolled, and hot rolled. You can also choose from 20#, 10#, and a53(a,b) china black rectangular hollow, as well as from structure pipe, boiler pipe china black rectangular hollow, and whether china black rectangular hollow is bsi, api, or ce. 

There are 15,821 suppliers who sells china black rectangular hollow on Alibaba.com, mainly located in Asia. The top countries of suppliers are Vietnam, China, from which the percentage of china black rectangular hollow supply is 1%, 99% respectively.