Old Dutch CC104 Tri-Ply Professional Oval Au Gratin Pan, 12 x 9", Copper Our premium Copper Tri-Ply material ensures energy-efficient, even heating. A stainless steel surface and an exterior layer of solid copper are permanently bonded to an aluminum core for exceptional performance, extreme durability and stunning looks Induction Capable stainless steel base stays flat delivering superior performance on all cooktops, flared rims allow for drip-free pouring, as well as Hollow-cast stainless steel handles are riveted to the cookware body for strength and durability Oven and broiler safe 10 Year Limited Warranty Guaranteed to be free of Manufacturing Defects