Commercial steel fire doors can be provided with windows, shutters, ventilation shutters, etc.as required, and the surface treatment is electrostatic spraying.

https://ztfiredoor.com/16406.html

riser door fire rating,single panel fire door,fire rated door self closing,fire safety door price,a rated doors,1 గంట రేట్ చేయబడిన వాల్ డోర్ రేటింగ్,riser door fire rating,ఫైర్ రేటెడ్ గ్యారేజ్ డోర్ 30 x 80,a rated doors,heat resistant door,single panel fire door,అగ్ని నిరోధక స్లైడింగ్ తలుపులు,riser door fire rating,స్లైడింగ్ గాజు అగ్ని తలుపులు,single panel fire door,fire rated insulated access door,a rated doors