Professional pastry chefs and bakeries bake on aluminum sheets for consistently perfect results. You can do the same, with our commercial quality Naturals Bakeware Collection. Made of pure aluminum, these premium pans produce evenly browned baked goods every time. Rims are reinforced with galvanized steel to prevent warping and aluminum will never rust. Our 3-piece cookie baking set is a cookie baker's dream combo. Set includes a Naturals Baker's Half Sheet, nonstick oven-safe baking grid 16.75"x 11.5"x 0.75", and Silicone Mat 16.13" x 11.13". All sized to fit together. BPA and Melamine free. Oven safe up to 400 degrees.