AC & DC rolling shutter door motor Automatic smoke curtain as a professional UL1784 certified 3 hour fire curtain manufacturer and supplier in China, all the UL1784 certified 3 hour fire curtain have passed the international industry certification standards, and you can be completely assured of quality. If you do not find your own Intent UL1784 certified 3 hour fire curtain in our product list, you can also contact us, we can provide customized services.