Master Class Bakeware from KitchenCraft - a secret manufacturing recipe in its own right, award winning Master Class bakeware from KitchenCraft.Featuring a double Quantum II non-stick coating which is silicone based and therefore PFOA and PTFE free. Most products are designed with rolled edges and sandblasted bases for extra durability and stability.Cook with confidence, Master Class bakeware offers the ultimate in cooking performance and versatility backed by a KitchenCraft 20 Year Guarantee. Dishwasher, oven, fridge and freezer safe 20 year guarantee overall with a 5 year guarantee for the non stick coating loose base for easy removal from the cake pan once cooked Depth; 5.5cm