Pure Virgin Acrylic - No scrap or polystyrene has been added. •Won't Yellow or become Brittle. •Full Weight and Full Thickness. •Withstands blows that would shatter normal glass. •First Acrylic Safety Glazing to be certified by the Safety Glazing Certification Council and meets ANSI Z97.1 impact standards and complies with ASTM-D-4802. •Made in U.S.A. •.100" Full 100 mil for Full Strength. Ten times more break resistant than ordinary glass. Stronger than single strength and .080".