Protections against high-speed impact (120 m/s) at extreme temperature, penetration, splash of liquids and heat. 99.9 % UV protection. Material    Clear polycarbonate. Size    8” x 15 1/2”. Thickness     1.0 mm. Best optical quality (highest ranking at the tests of spherical refractive power, astigmatic refractive power, prismatic refractive power, and light diffusion). Protective films on both sides.