Our sealing ring of this gasket is made of food grade rubber material, non-toxic, high temperatures, safety and durable use. It is very flexible, easy to place on the cover of your pressure cooker, efficient sealing, which guarantees the safety of cooking.Besides food safety, high temperature resistance is also a necessary guarantee. Our rubber ring can tolerate temperature from -40 to 500 degrees. It is easy to clean in dishwasher, or directly sterilized in boiling water. Also, it’s easy to store and drain in dish drying rack.