Tri-Ply Roasting Pan 37 x 29.5 x 6.5cm: Tri-Ply Pan, safe for stove top, hot plate, gas, steam and oven use.: Tri-ply design allows for even heat distribution along the interior of the cookware, eliminating hot spots. Constructed with three layers: Stainless Steel 18-8 Interior, Aluminum and Stainless Steel 18-8 Exterior