Description Each piece of Fat Daddio's Pro Series bakeware is made from Premium 3003 alloy and is anodised. The anodising process hardens and seals the surface producing an attractive, smooth and safe finish.  Anodised aluminium is non-reactive with acidic and dairy products. The straight sides and crisp corners ensure that your products line up perfectly everytime. Construction Each pan features folded corners and reinforced rolled edges to prevent warping even after years of use. Manufacturer guarantees every pan is free from workmanship defects for the lifetime of the product. Care & Maintenance Hand Wash. Manufacturer Warranty Guaranteed for 25 years - will not chip, warp, rust or blister.