260 Brass Square Tube, Material Brass, Inside Height 3/16 in, Wall Thickness 0.014 in, Inside Width 3/16 in, Material Grade 260, Outside Corner Shape Square, Mechanical Finish Mill, Overall Length 12 in, Outside Height 5/32 in, Outside Width 5/32 in, Standards ASTM B135, Temper H02 to H03, Inside Corner Shape Square, Rockwell Hardness 56 to 66, Shape Square, Length Tolerance +/-0.032 in, System of Measurement Inch