Sheet Stock, UHMW Polyethylene, Grade Standard, Plastic Length 4 ft, Plastic Width 4 ft, Plastic Thickness 0.25 in, White, Plastic Clarity Opaque, Tensile Strength 4,400 psi, Impact Strength 16.0 ft-lb/in, Friction Coefficient 0.15, Water Absorption 0.01 Percent, Temperature Range -70 Degrees to 180 Degrees F, Plastic Density 0.034 lb/cu in, Plastic Hardness 70D.