Did not know what it was for (has marks from pizzas cut on it.)

Experience the future of baking with AirBake's 2-piece insulated cookie sheet set, featuring sizes 14x12 and 16x14. Designed for electric ovens, these durable aluminum baking trays boast a non-stick surface, enhanced with micro-dome technology, ensuring your cookies slide off effortlessly. The silver cookie sheets are easy to clean and dishwasher-safe, simplifying your baking routine.

With a heat resistance of up to 450°F, these rectangular baking trays are perfect for any kitchen adventure. Their chemical-free construction ensures a safe baking experience, while the 1-inch depth provides ample space for your favorite treats. Bake with confidence and enjoy the convenience of these innovative baking tools.