110 Copper Square Bar, Material Copper, Material Grade 110, Mechanical Finish Mill, Overall Length 6 ft, Overall Width 1/4 in, Yield Strength 44,000 psi, Fabrication Cold Finished, Thickness 0.25 in, Thickness Tolerance +/-0.005 in, Standards ASTM B133, QQ-B-575, QQ-C-502C, SAE J461, SAE J463, Temper O, Heat Treatable Yes, Heat Treatment Annealed, Rockwell Hardness B66, System of Measurement Inch, Length Tolerance +/-3 in, Maximum Temperature 1,600 Degrees F, Minimum Temperature 1,400 Degrees F