Datong rice cooker is marked with 304. Taiwan Province Datong rice cooker This model is a mechanical uncoated stainless steel rice cooker, made of 304 stainless steel and rated at 700W. It has a capacity of 4L and is suitable for 5 to 6 people. The heating mode is chassis heating. Stainless steel with 304 mark is food grade stainless steel, and stainless steel without 304 mark is ordinary stainless steel, both of which are acceptable.