Berndes 9 Piece SignoCast Cast Aluminum Cookware Set Cast aluminum - vacuum pressure manufacturing process casting to form a solid cavity for perfect heat distribution Dupont Autograph 2 has a triple layer cooking surface and an exterior double layer Ergonomic handles for comfort;oven safe to 350 deggrees Tempered glass lids - knob & edge are stainless steel 18/10 Limited 10 year warranty