From Chicago Metallic, longtime suppliers of commercial bakeware, comes Professional Lifetime Non-stick bakeware. These pans are made of exclusive "aluminized" steel for even heat conduction and are heavy gauge to guard against warping A dual-process non-stick finish ensures that even the most delicate baked goods will release evenly, time after time, and makes cleanup a cinch. Wire rod reinforcement on the edges ensures there's no warping or "popping" in your oven.