The interior of the door leaf is filled with new environment-friendly flame retardant and thermal insulation materials, and is equipped with fireproof hardware fittings.

https://ztfiredoor.com/19649.html

steel fire resistan doors,fire rated interior doors,fire rated door,fire rated door hardware,steel fire resistan doors,apartment fire rated door,fire rated solid door,fire rated door,hotel fire rated door,steel fire resistan doors,fire aluminium panel door,apartment fire rated door,fire rated floor door,fire rated door,hotel fire door,apartment fire rated door