【New】This is a rubber gasket for a commercial-grade large pressure cooker. This gasket is for the SIS 50-liter pressure cooker, but it can be used for pots with a lid diameter of approximately 44-45cm. (It can also be used for other companies' commercial pressure cookers, such as 70-liter and 45-liter models, if the diameter is around 44cm.) ☆お得な二本セットです☆ (Comes in a set of two for a great value!) This is a rubber gasket for the old-model SIS 50-liter commercial pressure cooker (C44). As it is a consumable item, replacement is recommended every six months to a year! ☆We recommend using genuine rubber gaskets for commercial pressure cookers, as using non-genuine ones may cause air leaks.