The smoker can be cast iron with a thickness of about two millimeters. If it is too thick, heating will be slow, and there will be heat loss. If it is too thin, it will burn easily! Do not use stainless steel. The Cr content of stainless steel is very high, and there are many inferior stainless steels on the market. If baked at high temperature for a long time, it is easy to precipitate Cr from stainless steel, which is harmful to human body, such as Parkinson's disease.

Wish you success!