Thickness 5 to 20mm high-impact strength HDPE sheets . High Density Polyethylene Sheet, Matte Finish, 3/4 3/4 inches Item Width Tolerance +/-0.125 inches Length: 12 inches Material: HDPE (High Density Polyethylene) Measurement System: Inch Mo . custom Thickness 5 to 20mm HDPE board application-HDPE board