For storm door windows or any glass areas which are most likely to be struck by your family or pets. Economical, safer than annealed glass, easy-to-install, and shatter-resistant. Optix acrylic is certified to meet the ANSI (American National Standards Institute) Z97.1-1994 standard. .080 (5/64"), .100 (1/10"), .118 (1/8"), .220 (1/4") approximate thicknesses. These States Have Safety Laws In Effect: Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, Florida, Georgia, Hawaii, Idaho (Building Code), Illinois, Indiana (Building Code), Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri (Effective 1/1/77), New Jersey, New York, North Carolina (Building Code), Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Virginia, Washington, West Virginia, and Wisconsin.