Steel doors, also known as steel doors, are divided into anti-theft doors, fireproof entrance doors, bedroom doors, etc. Mainly used for entering households, bedrooms, courtyards, etc. The surface can be single color or patterned. The door leaf surface is made of steel plate, filled with honeycomb paper, polyurethane foam board, etc. The fireproof door is filled with perlite door core board, and the size is customized according to the customer.