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/23836.html

light fire exit door,soft close fire door hinge,hose fire fighting cabinet mild steel single door,flat push bar fire escape door lock,commercial fire door,light fire exit door,comercial fire doors,soft close fire door hinge,pòt komèsyal eksteryè dife rated pòt asye,flat push bar fire escape door lock,pòt dife panèl vizyon,light fire exit door,nan pòt dife pòt,soft close fire door hinge,metal fire proof door for interior,flat push bar fire escape door lock