Bundle of 2: Ceramic Green Non-stick Bake Pan (9x13) and 11 X 17 Jelly Roll Pan By Orgreenic Kitchenware *Both Pans Aluminum coated steel. Ceramic non-dtick coating is bonded to the aluminun steel. *The aluminun base allows for even heat and avoids hot spots so you cook evenly. *Lifetime warranty on both pans provided from Telebrands. *Just as with the finest high qualtiy bakeware, the pans need to seasoned prior to first use. Steps provided. But only takes 20 minutes in oven after coating with vegetable spray. *Best reason for purchase: you can cook without oil, butter or grease