Stainless Steel Roaster: 18/10 polished stainless steel cooking surface, pure aluminum core and copper exterior Stainless Steel Roaster:1. Beautifully polished, elegant copper exterior layer.2. Pure aluminum ... 't have "hot spots" when cooking.3. Stainless-steel interior layer/cooking surface.4. Long, polished stainless, stay-cool handles.5. Sturdy, non-corrosive ...