All-Clad cookware is highly prized for its extraordinary performance and quality. Copper Core is the result of many fine elements coming together. Its 5 ply design features an 18/10 stainless steel cooking surface which will not interact with food. At the heart of Copper Core are 2 layers of aluminum with a generous layer of copper in-between. The aluminum provides even heating and the copper speeds up the process of heating and cooling allowing chefs and home cooks alike to control temperature like never before! The exterior features a highly polished magnetic stainless steel and a band of copper for a dramatic, elegant appearance. The luminous magnetic steel ensures Copper Core will work on every cooktop including induction!