Rectangle Stock, Cast Acrylic, Antistatic, Plastic Length 4 ft, Plastic Width 4 in, Plastic Thickness 0.1875 in, Clear, Plastic Clarity Clear, Tensile Strength 9,000 psi, Impact Strength 0.3 ft-lb/in, Friction Coefficient 0.8, Water Absorption 0.4 Percent, Plastic Density 0.043 lb/cu in, Corrosion and Chemical Resistance Fair