Plastic Sheet Stock Polystyrene Standard Plastic Length 4 ft Plastic Width 6 in Plastic Thickness 0.1875 in White Plastic Clarity Opaque Tensile Strength 2 500 psi Impact Strength 0.2 ft-lb/in Friction Coefficient 0.5 Water Absorption 0.3 Percent Plastic Density 0.038 lb/cu in Corrosion and Chemical Resistance Fair