Fat Daddio's Round Cake Pan 6 Inch Diameter by 2 Inch deep. 16 gauge Hard 3003 Aluminum Straight Sides Small Bottom Radius Hard Anodized for Durability Rolled Rim for Strength Fat Daddio’s Professional Aluminum Bakeware is anodized, a process that thickens, toughens and seals the naturally occurring protective oxide found on aluminum. The result is beautiful aluminium bakeware with better cake release and clean up. The professional, abrasion resistant pan that won't peel, chip flake, chalk or discolor. 100#37; dishwasher safe.