Calphalon Triply Stainless Steel 13-piece Set Includes: 8-Inch, 10-Inch and 12-Inch Omelette pans, 1-1/2 and 2-1/2-quart Covered Sauce Pans, 3-quart Covered Saute Pan, 3-quart Covered Chefs Pan and 6-quart Covered Stock Pot. Classically styled with a polished, stainless steel exterior and a satin finished interior, Calphalon Tri-Ply Stainless Steel cookware is designed with three layers to ensure even, consistent heating. A heavy-gauge, aluminum core surrounded by two layers of stainless steel provides excellent heat conduction for browning and enhanced control of the cooking process.