The Le Creuset Stoneware Grey Oval Au Gratin Casserole Baking Dish is a high-quality two-piece set made of durable ceramic material. The oven-safe baking dish, measuring 11.5x8x2 inches, is perfect for cooking a variety of dishes in both electric and gas ovens up to 500°F. With a stylish gray color and dishwasher-safe surface coating, this baking dish is both practical and aesthetically pleasing. Manufactured in France by Le Creuset, this Au Gratin model comes with a 5-year warranty and is machine washable up to 140°F for easy cleaning.