Fiberglass Plate, Material Fiberglass, Color Dark Gray, Thickness 0.25 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