In normal use, the gasket of your pressure cooker will normally need replacing every 6-9 months. If, when you check your gasket\'s condition after use, it has become hard or developed cracks, you will require a new one. This genuine Prestige part is suitable for the following models: 57052, 57057, 57053 and 57055.Smartplus Pressure Cooker Gasket FeaturesReplacement gasketBlackUse with 5L aluminium pressure cooker 57052/57057Suitable for 4.25L coated aluminium curry pan 57053/57055Genuine sparePrestige\'s Ref.MPN: 57070Colour: BlackSizes: One SizePM Ref. 830764