Sheet Stock, Cast Acrylic, Grade Standard, Plastic Length 4 ft, Plastic Width 4 ft, Plastic Thickness 0.25 in, Blue, Plastic Clarity Clear, Tensile Strength 9,000 psi, Impact Strength 0.3 ft-lb/in, Friction Coefficient 0.8, Water Absorption 0.4 Percent, Temperature Range 40 Degrees to 190 Degrees F, Plastic Density 0.043 lb/cu in, Plastic Hardness Rockwell M95