Sealing ring a necessary component to pressure cooking processnKeep one handy as a replacement partnFits WMF 3-, 4.5, 6.5, and 8.5- quart pressure cookernDishwasher safenLost your gasket during cleanup? No problem! This WMF Perfect Plus sealing ring is designed as a replacement part for the 3-, 4.5-, 6.5-, and 8.5-quart pressure cooker lids. An essential component to the pressure cooking process, it is recommended by the manufacturer to replace this part at least every two years or if the ring becomes visibly worn.