The Granite Ware 15.5-qt Tamale pot with Lid features a steel core for strength. It has porcelain fused to the steel, producing a non-porous, inert glass surface that's easy to clean. This Granite Ware 15.5-qt Stock Pot is naturally nonstick and distributes heat evenly for convenient, easy cooking. Its innovative construction adds no chemicals to the food, so it preserves the natural taste, color and nutritional value. Continue a tradition passed down through the generations with our Granite Ware 15.5 qt Tamale Pot. Not recommended for glass stove tops.