5. Gree electric pressure cooker has 5 sealing rings, one big and four small. The sealing ring of the electric pressure cooker lid has a large one, which is installed on the metal disc inside the lid and clamps the edge of the disc. Zhuhai Gree Electric Co., Ltd., founded in 1991, is an international home appliance company integrating R&D, production, sales and service. It owns three major brands: Gree, TOSOT and Jinghong.