The moulded 4 panel smooth internal fire door has a traditional style with a smooth design which will look great in any homethis door provides 30 minutes of fire protection when hung in accordance with the manufacturers instructions in an appropriate frame with intumescent strips in the jambs and head or top and long edges of the door click on the video link under the product image for more details on installing fire doorsplease notethe following sizes are narrow and are supplied with 2 pa