Material : High Density Polyethylene Shape: Sheet Thickness: 1 inch Width: 12 inches Length: 24 inches Finish: Smooth HDPE (High Density Polyethylene) Plastic Sheet 1/8" x 24" x HDPE (High Density Polyethylene) Sheet, Opaque White, Standard Tolerance, UL 94HB, 1/8" Thickness, 24" Width, 48" Length. 4.3 out of 5 stars. 55. 1 offer from $21.31.