304 stainless steel, and , the cooking-surface can dissipate heat rapidly and evenly. Easy to clean. The bottom of the heat collecting conducts heat evenly. The glass cover allows you to check the conditions of the food and control the cooking-time. Suitable for steamed fish, seafood, potatoes, coarse grains, cereals, vegetables and eggs. You can also cook soup and noodles. Cut the whole fish into pieces while maintaining flavor and low calories. It can also be used to cook corn. It can not only be used as a fish steamer, but also as a soup for the whole family. It very practical when you need to cook lots of food during activities or holidays.