Atlas Tube is the largest Hollow Structural Section (HSS) manufacturer in North America with plants located in Chicago, IL, Harrow, ON Canada, Oak Bluff, MB Canada, Plymouth, MI, Blytheville, AR and Birmingham, AL. Known for flexible manufacturing and products that include A500 HSS, Jumbo HSS and A1085 HSS, Atlas Tube routinely develops tools for engineers designing with HSS. We manufacture HSS squares from .5x.5 to 22x22, rectangles from 2x1 to 20x12 and rounds from 0.84" to 20" in wall thickness from 0.083"-0.875". (less)