Constructed of 7/8" Inland Red Cedar for long lasting outdoor use. Assembled with weather-resistant plated deck screws, aluminum rust-resistant continuous hinges, and fully routed edges. Overhang roof, vents and drainage holes keep nest dry and cool. Predator-resistant entrance, 1-1/2" diameter. Interior front wall screen helps chicks climbing out. Front door tilts down for easy cleaning. Comes with mounting screws. Dimensions: 7" W x 7" D x 15" H. North American Bluebird Society approved. Made by Birds Choice.