Steel fire door cold-rolled steel, cold forming. Inner doors according to fire resistance rating required to fill refractories, according to user needs can be equipped with a variety of hardware accessories. Product surface by rust after spraying the factory, according to user requirements can also be spray, and other surface treatment. The product is strong integrity. Support high strength at high temperature, manufacturing beautiful, it is ideal for a variety of high-grade buildings. This product can be mounted on the doors of various sizes transparent composite fire-resistant glass, you can rent a small glass, half glass, and large glass fire door, which can effectively improve the channel, fire evacuation lighting performance and aesthetic properties of other parts of the mouth.