K5540 Plastic Sheet Polycarbonate Grade Scratch UV Resistant Plastic Length 24 in Plastic Width 24 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