Nordic Ware’s Naturals® Bakeware represents the most comprehensive collection of sizes, shapes and styles of pan available in the market. The Naturals® collection is made from pure uncoated aluminum which conducts heat rapidly and evenly, resulting in beautifully browned foods no matter what’s on the menu. Uncoated aluminum is free of chemicals and coatings for healthy baking, and is safe for use under the broiler. The quality materials and care we put into creating each and every piece gives us the confidence to say Naturals® pans are built to last a lifetime. Once you bake with them, you’ll understand why pure aluminum bakeware continues to be an indispensable classic in both professional and home kitchens alike. Encapsulated galvanized steel rims prevent warping. From sheet pan dinners and baked goods to food prep. Creativity meets natural aluminum sustainability. Compatible with parchment paper or silicone baking mats if desired. Easy clean up; hand wash recommended. Scouring pads and metal utensils may scratch pan but will not affect baking performance. Aluminum is reactive to the acids in certain foods such as vinegar and tomato products which may darken, pit or corrode the pan. Set includes two half sheet pans and comes with a convenient lid for transporting and storing your baked goods. Lid is made of BPA and Melamine-free polypropylene. Each Half Sheet exterior dimensions 17.9 x 12.9 x 1 inches and interior dimensions 17.1 x 12.1 inches. Lid measures 18.3 x 13.1 x 1.5 inches. Made in America of domestic and imported materials. Our aluminum bakeware-quality pieces are made to withstand a lifetime of use in your home kitchen.