90mins Fire Door With Vision Panel

90mins Fire Door with vision panel Heavy duty steel flush unit with 5 in. x 20 in(127*508mm). Vision light (polished wire glass) and welded frame ,the fire rating time is 90 mins.The wire glass is UL listed standard,thickness is 6.8mm. For some Middle East areas, people would like to use the tempered glass.The size prefer bigger.
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