Sheet Stock, Polycarbonate, Grade Standard, Plastic Length 4 ft, Plastic Width 8 in, Plastic Thickness 0.25 in, Clear, Plastic Clarity Clear, Tensile Strength 9,700 psi, Impact Strength 14.0 ft-lb/in, Friction Coefficient 0.53, Water Absorption 0.13 Percent, Temperature Range -40 Degrees to 240 Degrees F, Plastic Density 0.043 lb/cu in, Plastic Hardness Rockwell R120