2 Pack Black 17" x 21" x 0.170" 4.3mm LDPE Black Plastic Sheets, Low Density Polyethylene Sheets, Highly Versatile, Flexible and Impact Resistant, Plastic Sheets, Made in USA2 Pack of 21 x 17 x . 170" 4. 3mm Utility grade LDPE Sheets, Great Value that doesn't break the bank! These LDPE sheets are used more for their versatility and stability rather than their appearance. EASY TO USE: Our LDPE sheets are easy to CUT, THERMOFORM, and DRILL. Great for DIY projects around the home or for your marine adventures. FLEXIBLE and DURABLE: Our material provides the level of quality you're looking for in a low density polyethylene