The 12.5x10-inch nonstick roasting pan from Swiss Diamond is made with an ultra-hard coating that incorporates diamond crystal in combination with a non-stick nano-composite. This coating is used because of its abrasion resistance, excellent thermal conductance and maximum non-stick properties. The skillet is made from heavy duty, professional quality 6mm thick pressure cast aluminum that will never warp. It has a perfectly flat base for use on all ceramic, gas and electric cook tops, in addition to roasting in the oven.