The steel fireproof door is a door frame, door leaf frame and door leaf panel made of steel materials. The fire resistance time of Class B steel fire door shall not be less than 1.0 hour, and the hardware fittings used on the fire door must also be fire-resistant hardware fittings.

https://ztfiredoor.com/20178.html

fire rated door,the fire door,fire protection door,fire front door,anti fire door,fire rated door,fire door regs,the fire door,fire egress door,fire front door,fire rated shutter door,fire rated door,a fire door,the fire door,fire entry door,fire front door