HEALTHY Our baking sheets are made of pure 180 stainless steel material without toxic chemical coating or any other materials, a great replacement for the aluminum pan. You needn't worry about rusty or chrome flaking off into your food. INDUSTRIAL-GRADE These cookie sheets come with proper weight and feel sturdy when holding in hands thick gauge 180 stainless steel material with heavy duty construction, doesn't warp and twist. VERSATILE Rectangular baking pans with 2 different sizes - large 12.4L x 10W x 1H inch, medium 9.5L x 8W x 1H inch, perfect for making various deep dish meals, handy to be a spare pan, versatile for baking lasagna, roasting chicken meat fish, reheating leftovers. OVEN DISHWASHER SAFE Smooth mirror finish surface conductive to clean up nicely and easily, oven safe to bake the food you want, dishwasher safe to save your labor and time, convenient to your life. CRAFT The baking trays have round corner and smooth roll edge, comfortable and easy handling in and out of oven. Mirror finish keeps shiny nonstick and easily releases, you can easily clean up even in hand-wash.