1) Aluminium body &cover,polished surface pressure cooker,pressure pot 2) Diameter (cm): 18, 20, 22, 24, 26, ... , 30, 32 for you Aluminium body &cover,polished surface pressure cooker,pressure pots.Descriptions:1) Aluminum alloy stronger body and cover ... , easy to open andclose the lid5) Multi-safety devices6) Quick and even heat transmission7) Pressure cooker, 3L,4L,5L,7L,9L,11L ...