Steel fire doors have excellent sound insulation and thermal insulation properties. Steel fire doors can save energy, electricity and heating. The steel fire door has good airtightness. Once it is closed, it will be tightly closed, and it will not leave the door seam and cause the air-conditioning and heating to overflow.

https://ztfiredoor.com/14239.html

steel fire door with panic push bar,3 hr fire door,fire rated mild steel flush double door,white 34 inch fire rated steel insulated door,size 9×21 or 10×21 fire rated doors,3 hr fire door,fire door use for textile industry,steel fire door with panic push bar,emergency fire exit door 900 x 2100,white 34 inch fire rated steel insulated door,90 min fire rated door hinge,steel fire door with panic push bar,price of fire rated sliding doors,white 34 inch fire rated steel insulated door,3 hr fire door