The interior of the door leaf of the steel fire door is filled with a new type of environmentally friendly flame retardant and heat insulation material, which is non-toxic and harmless to the human body. It is a steel fire door with certain fire resistance composed of fireproof hardware accessories.

https://ztfiredoor.com/20796.html

fire rated steel entry door,fire rated metal,fire rated metal door,fire rated steel door residential,fireproof metal door,fire rated steel entry door,fire proof metal door,fire rated metal,fire rated hollow metal door,fire rated steel door residential,fire door metal,fire rated steel entry door,fire rated pressed metal door frames,fire rated metal,steel fire rated doors and frames prices,fire rated steel door residential