Nordic Ware 46670 Natural Prism Bakeware Pan, 9 x 13 Inch, Silver Metal utensils and scouring pads may scratch natural aluminum pans, but will not affect baking performance. Dishwasher use is not advised, as discoloration will occur due to the cleaning agents used in automatic dishwasher detergent. Pfoa-free nonstick coating Formed aluminum Made in the USA