Quarter sheet baking aluminum pan. - Just received. First thought was that it was not the heavy product I was expecting but better then most. I inspected the underside and the way the edges of the aluminum are rolled to make the edges, the seams are basically just pinched instead of a complete seal on the metal which when washing I feel the water will get in under the edges causing the water to not drain properly. The description does say it won't rust but it's not good to put away dishes not completely dry which can draw bugs. Other Nordic Ware products have always been outstanding. - Returning this product.