Plastic Sheet Stock HDPE Marine Plastic Length 12 in Plastic Width 4 in Plastic Thickness 1 in White Plastic Clarity Opaque Tensile Strength 4 000 psi Impact Strength 1.1 ft-lb/in Friction Coefficient 0.31 Water Absorption 0.05 Percent Plastic Density 0.034 lb/cu in Corrosion and Chemical Resistance Good