This Bluebird birdhouse is made from Cedar with plated deck screws. Overhang roof, vents and drainage holes keep nest dry and cool. Predator resistant entrance hole. Front wall screen helps chicks climbing to the 1 9/16 inch entrance hole. Front door opens for easy cleaning. Comes with mounting screws. Measures approximately 8 1/2 inches long by 7 1/4 inches wide by 18 inches high.