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About product and suppliers:
        Alibaba.com offers 4,769 20mm square bar products. About 7% of these are stainless steel bars, 1% are steel round bars, and 1% are square steel. 

A wide variety of 20mm square bar options are available to you, such as astm, aisi, and jis. You can also choose from square, round, and flat. As well as from bv, iso, and sgs. And whether 20mm square bar is free samples, or paid samples. 

There are 4,769 20mm square bar suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of 20mm square bar respectively. 

0mm square bar products are most popular in Domestic Market, North America, and Southeast Asia. 

You can ensure product safety by selecting from certified suppliers, including 1,091 with Other, 938 with ISO9001, and 142 with ISO14001 certification.