U Channel Stock Isopthalic Polyester Fire-Retardant Resin (ISOFR) Dark Gray Color Leg Length 1 5/8 In Base Width 6 In Wall Thickness 1/4 In Length 5 Ft Base Width Tolerance +/-0.094 In Wall Thickness Tolerance +/-0.010 In Length Tolerance +/-0.1875 In Min Temp Rating -100 Deg. F Max Temp 150 F Tensile Strength 30 000 PSI