All-Clad d5 Polished Stainless Steel 10 Inch Fry Pan - SD55110 Each of the five bonded layers serves a specific purpose, creating a noticeable difference in cooking performance. 8/10 stainless-steel interior for foolproof browning and easy cleanup. Two aluminum layers, one to conduct and one to sustain heat. Patented stainless-steel core diffuses heat for consistent results. Magnetic stainless-steel exterior for durability and dishwasher-safe ease.