Angle Stock Angle 90 Degrees Square Corners Isopthalic Polyester Fire-Retardant Resin (ISOFR) Smooth Finish Dark Gray Color Thickness 3/8 In. Leg Length 6 x 6 In. Length 5 ft. Thickness Tolerance +/-0.010 In. Leg Length Tolerance +/-0.094 In. Length Tolerance +/- 0.1875 In. Min Temp Rating -100 Degrees F Max Temp 150 Degrees F Tensile Strength 30 000 psi