Fire steel door has a long flame retardant time to prevent the fire from spreading, cut off the fire source, and strive for fire rescue time.

https://ztfiredoor.com/22038.html

BS 45 minute fire rating,commercial steel fire doors,pocket door fire door,internal home fire doors,fire door fire rating,BS 45 minute fire rating,fire proof external doors,fire rated door 30 x 80,internal home fire doors,fire doors for residential homes,internal home fire doors,fireproof access door,BS 45 minute fire rating,solid fire rated door,internal home fire doors,60min fire door,1 hr rated door,internal home fire doors