Prestige Inspire Bakeware. Prestige Cushion Smart interior provides better browning and food release. Metal utensil safe non-stick interior. Manufactured from heavy gauge carbon steel for superior heat conduction and distribution. Oven safe up to 240°C/475°C/Gas Mark 9. Dishwasher Safe. Prestige Long Lasting Performance. Prestige Inspire bakeware, manufactured using a heavy gauge, carbon steel construction which will conduct and distribute heat more evenly, every time. Featuring the Prestige Cushion-Smart Design, for a better browning and easier releasing non-stick (excludes 4 Cup Yorkshire Tin, 12 Cup Muffin Tray, 6 Cup Jumbo Muffin Tin and Pizza Crisper). Dishwasher and Oven safe up to 240°C/475°F/Gas Mark 9.