Fiberglass Square Tube Material Fiberglass Wall Thickness 0.125 in Color Dark Gray Inside Corner Shape Square Outside Corner Shape Square Outside Height 2 in Outside Width 2 in Inside Height 1 3/4 in Inside Width 1 3/4 in Overall Length 5 ft Maximum Temperature 150 Degrees F Resin Type ISOFR Standards ASTM E-84 Tensile Strength 30 000 psi Wall Thickness Tolerance +/-0.019 in Type Square Type Square Tube Length Tolerance +/-0.1875 in Minimum Temperature -100 Degrees F