Stainless Steel Square Tube 304 Stainless Steel 304 Square 20 ft Overall Length 1 3/8 in Inside Width 1 3/8 in Inside Height 1 1/2 in Outside Width 1 1/2 in Outside Height Wall Thickness 0.083 in Wall Thickness Tolerance +/-0.100 in Fabrication Cold Finished Welded Heat Treatment No Heat Treatment Heat Treatable No Mechanical Finish Mill Yield Strength 30 000 psi Tensile Strength 75 000 psi Not Rated Brinell Hardness Not Rated Rockwell Hardness