Circulon has been providing the same excellent quality for over 30 years and this Momentum roasting tray is no different. Each reusable baking sheet features our total non-stick technology which offers exceptional food release and an easy clean up. The baking sheets are made from heavy gauge, durable carbon steel that is extremely long-lasting - one of the toughest on the market today. This set has been designed with bakers in mind to deliver an unparalleled experience. These non stick baking trays for oven also come with our hassle free Limited Lifetime Guarantee! Product specification: Oven safe: 230°c / 450°f / gas mark 8 Material: carbon steel Dimensions: small - 9" x 6" / large - 11.5" x 17" Non-stick: yes Dishwasher safe: yes