Fiberglass Sheet Material Fiberglass Color Dark Gray Thickness 0.5 in Overall Length 8 ft Overall Width 4 ft Resin Type VEFR Maximum Temperature 180 Degrees F Thickness Tolerance +0.125/-0.063 in Type Smooth Standards ASTM D-635 ASTM E-84 NSF Standard 61-Certified Top Surface Texture Smooth System of Measurement Inch Shape Sheet