Well, it depends on what materials you use, such as iron, KFC doors, aluminum alloys and stainless steel. Ordinary iron will rust if it has a short life. Aluminum alloy stainless steel is better, its life is longer than that of iron, and its price is relatively higher. There are more aluminum alloy KFC doors on the market! The biggest advantage of KFC door is that it is well sealed, beautiful and elegant, and it is the first choice for the facade of the store. I hope these will help you. There are many KFC processing plants here in Weifang Linqu!