Durable aluminum construction. Professional quality. Dishwasher-safe. Complete with storage lid. Dimensions: 18L x 13W x 1H inches. The Nordic Ware 43103 Natural Bakeware Aluminum Bakers Half Sheet with Storage Lid is the perfect size for baking cookies brownies biscuits or any baked goods. The aluminum construction ensures even baking and consistent results and the included storage lid makes saving your baked treats a cinch. This baking sheet is dishwasher-safe for easy cleanup.