Fat Daddio's pans are made of premium aluminum that ensures superior durability and a lifetime of baking confidence. 1/2" flange on all sides makes this pan easy to handle. Completely seamless pans mean that you never have to worry about split edges, uneven corners, or leaking. Even wall thickness results in an even rise and eliminates hot and cold spots in your cakes. Fat Daddio's anodized bakeware is a safe, environmentally friendly, electrochemical process that thickens, toughens, and seals the pan. The result is beautiful aluminum bakeware with better cake release and easier cleanup that is 100% dishwasher safe and won't discolor like natural aluminum.