Steel fire doors are made of steel. In addition to the door frame, its skeleton, panels, fillers, etc. are all required to be non-toxic and environmentally friendly fire and heat insulation materials, and will be equipped with hardware accessories later.

https://ztfiredoor.com/21407.html

fire rated insulated access door,fire safety door price,sliding glass fire doors,fire rated door self closing,1 hour rated wall door rating,fire rated insulated access door,heat resistant door,riser door fire rating,fire rated door self closing,single panel fire door,fire safety door price,a rated doors,fire rated garage door 30 x 80,fire rated door self closing,fire resistant sliding doors,fire rated insulated access door,fire door for garage entry,fire safety door price