Fire door hinges are non combustible, non explosive, water resistant, chemical resistant, non-toxic and have good mechanical strength.

https://ztfiredoor.com/24160.html

BS a 24 hour door,fire exit gate locks,fire exit door with window,panic lock for emergency exit,fire escape door lock,BS a 24 hour door,emergency exit door price,fire exit gate locks,lockable fire exit doors,panic lock for emergency exit,fire escape door price,BS a 24 hour door,emergency garage,fire exit door alarm,panic lock for emergency exit,emergency exit gate lock,fire exit gate locks