Rectangle Stock, Nylon 6/6, Glass-Filled, Plastic Length 4 ft, Plastic Width 4 in, Plastic Thickness 1 in, Black, Plastic Clarity Opaque, Tensile Strength 13,000 psi, Impact Strength 0.6 ft-lb/in, Friction Coefficient 0.16, Water Absorption 0.75 Percent, Plastic Density 0.042 lb/cu in, Corrosion and Chemical Resistance Fair