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Independence Tube's indented tube is produced to
ASTM A500 Grade B chemical and physical properties but is not intended for
structural load bearing applications. The tube is manufactured as a standard 4"
square X 10 gauge to 3/16" wall tube with an indentation on one side. With the exception
of the indentation, standard ASTM A500 tolerances apply. If you are interested in
having the indentation on another size, please contact your Independence Tube Representative.

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