... steel 3. Door leaf thickness: 50/70/90 Intime hotel entrance door YT-FD718Description:Professional manufacturer with 10 year experience, high quality ... )3. Surface finish:Heat-transfer painting or powder coating4. Door leaf:Door leaf thickness: 50\70\90mmFilling: Honeycomb paper, ceramic fiber ... , school, hotel, buiding, ect, more durable, environmental friendly. Intime Steel Security door YT-FD718