Fat Daddio's Round Cake Pan is made with 16-gauge anodized aluminum. There are no seams or weld lines often found in other pans. Anodizing completely seals the aluminum, making a smooth scratch-resistant surface, and ensures there is no cross-contamination or leaching of aluminum into foods. Anodized aluminum is also non-reactive with acidic and dairy ingredients. Fat Daddio's anodized bakeware offers superior baking performance, even heat distribution, safety, and durability. Dishwasher safe. Lifetime warranty.