This Pedrini 7 Piece Bakeware Set is constructed of carbon steel and has the exceptional ability to distribute oven heat to all sides of pans quickly and evenly. The nonstick coating on the interior and exterior offers easy release and quick clean-up. The sheet cake pans include matching locking lids with handles for easy transport of baked goods. 7 piece set includes two 9x13 inch sheet cake pans with lids, one 13 inch cookie sheet, one 15 inch cookie sheet, and one 17 inch cookie sheet. Dishwasher safe.