The hidden fire rated door has good fireproof performance, and does not need hardware such as traditional door closer hinges.

https://ztfiredoor.com/25574.html

fireproof fire rated external door,prehung formica internal fire door,fire rated exit door,fire rated double door,fire rated french doors,ire doors rated 30×80,fireproof fire rated external door,fire rated double swing doors,fire rated exit door,fire rated warehouse door,fire proof bi fold door,fireproof fire rated external door,fire rated frameless doors,fire rated french doors,fire internal door,fire rated exit door,fire rated french doors