California Proposition 65: This product contains a chemical known to the State of California to cause birth defects or other reproductive harm. ABS Sheet, ABS, Grade Standard, Plastic Length 4 ft, Plastic Width 4 ft, Plastic Thickness 0.1875 in, Black, Plastic Clarity Opaque, Tensile Strength 6, 000 psi, Impact Strength 12 kJ/m2, Friction Coefficient 0.11, Water Absorption 0.2 Percent, Temperature Range -4 Degrees to 158 Degrees F, Plastic Density 1.03 g/cc