2 Units Sheet White .375" 3/8" HDPE x 12" x 12" Polyethylene,12" x 12" Polyethylene 2 Units Sheet White .375" 3/8" HDPE x, giving HDPE a higher specific strength, High-density polyethylene, unlike polypropylene, cannot withstand normally-required autoclaving conditions,The difference in strength exceeds the difference in density, Free Worldwide Shipping Trend fashion products Quality Products at Discount Prices. x 12" x 12" Polyethylene 2 Units Sheet White .375" 3/8" HDPE.