This 13 x 4" deep loose base round cake pan is PFTE free and constructed from robust heavy gauge alloy. Known as `Heat Spread Technology', during cooking, the core material draws in all available heat and distributes it evenly for a perfect finish. In common with many high-quality products, anodised and silver anodised products should never be put in the dishwasher. Simply wash in hot soapy water and dry thoroughly. All Silverwood products are designed and manufactured in the UK.