Heavy gauge hard anodized aluminium. DuPont's advanced autograph 2 non stick interior. Stainless steel lids with riveted handles for additional durability. Double full cap base features a layer of aluminium that is encapsulated with copper followed by a further layer of aluminium and finished with an impact bonded magnetised stainless steel cap. Suitable for all cooker types including induction. Oven safe to 240°C/500°F/Gas mark 9. Limited life time guarantee. Made in Thailand.