With the replacement silicone sealing ring from WMF, measuring 180 mm in diameter, you can ensure the performance of your pressure cooker. It is recommended to replace the sealing ring after approximately 400 cooking processes or at least every 2 years. The sealing ring provides a hermetic seal that enables fast and safe cooking while preserving the flavors of the food. The silicone sealing ring fits all WMF pressure cookers with an inner pot diameter of 180 mm.