Reasons to choose the Circulon Ultimum 9" round cake tin: Ultra Hi-Low Non-Stick System. Baked foods release with ease and cleanup is effortless. Perfect, even baking performance. Ideal for heating food from frozen. Limited Lifetime guarantee. Technical specification: Material: Carbon Steel Measurements: 23cm x 23cm Oven Safe: 230°C/450°C/Gas Mark 8. Non-stick: Yes Dishwasher safe: Yes