Fiberglass Plate Material Fiberglass Color Dark Gray Thickness 0.5 in Overall Length 12 in Overall Width 12 in Resin Type ISOFR Maximum Temperature 150 Degrees F Thickness Tolerance +0.125/-0.063 in Type Gritted Standards ASTM D-635 ASTM E-84 NSF Standard 61-Certified System of Measurement Inch Length Tolerance +/-0.125 in Shape Plate