G-10/FR4 Fiberglass Epoxy Laminate Sheet Material Fiberglass Epoxy Laminate Color Brown Clarity Opaque Thickness 3/8 in Overall Length 9.167 ft Overall Width 4 ft Tensile Strength 40 000 psi Maximum Temperature 285 Degrees F Minimum Temperature -454 Degrees F Corrosion and Chemical Resistance Excellent Hardness Rockwell M110 Thickness Tolerance +/-0.030 Impact Strength 7 ft-lb/in Standards MIL-I-24768/27 (GEF) Friction Rating Not Applicable Grade G-10/FR4 Grouping Sheet Stock