5-25mm high density plastic sheet application Spain 5 Pack 12 x 12 x.125 Black HDPE Sheets, Great for DIY Projects for Home and Marine Applications, Black Plastic Sheets, High Density Polyethylene Sheets, Made in USA. 4.4 out of 5 stars. 561. $22.99. $22. . 99 ($4.60/Item) Get it as soon as Tue, Apr 12.