The Masonite Lincoln Park door is ideal for interior rooms. It's made from moulded MDF (medium-density fibreboard) for outstanding durability, and it has the look of solid wood. The material resists warping or cracking, even in humid conditions. The interior panelled door comes pre-primed from the factory, so all you have to do is select a color and paint it. The smooth finish and single, large panel provide a classic aesthetic. Reversible handing means you can adjust this Lincoln Park door to open into or out of a room. Since safety is a paramount concern, this unit is rated to be fire resistant for up to 20 minutes. The 30 inch by 80 inch door is 1 3/8 inches thick.