G-10/FR4 Fiberglass Epoxy Laminate Sheet Material Fiberglass Epoxy Laminate Color Yellow Clarity Opaque Overall Length 4 ft Tensile Strength 38 000 psi Maximum Temperature 300 Degrees F Minimum Temperature -70 Degrees F Density 0.072 lb/cu in Standards UL 94 V-0 Impact Strength 14 ft-lb/in Hardness Rating Extra Hard Friction Coefficient Not Applicable Corrosion and Chemical Resistance Good Friction Rating Not Rated Grade G-10/FR4 Hardness Rockwell M110