The Traditional Uncoated Large Cookie Sheet is part of the top-of-the-line Commercial II™. The line - which is manufactured in both traditional uncoated and dual coated, diamond-quality non-stick bakeware - is built strong and made to last - day after day, year after year. The heavy-weight aluminized steel ensures superior heat conduction and even baking. Chicago Metallic stands behind every Commercial II™ product with its Lifetime Warranty ensuring the avid baker sturdy construction and product longevity. Some other durable products that you might be interested in are the Traditional, Uncoated, Bake & Roast Pan; and the Non-stick Perforated Baguette Pan.