Bluebird house is made with insect and rot resistant premium cedar. Air vents allow for maximum air ventilation through wall and floor openings. Clean out doors provide easy access for cleaning and bird viewing. 2 predator guards extend entrance hole to protect against predators, 1-1/2 In. for Eastern and 1-9/16 In. for Western bluebirds. Fledgling skerfs provide extra grip for fledglings to climb out. Features rust free stainless steel screws, pole or flush mount, and water based protective stain. Attracts bluebirds and swallows. 2 Lb. 13 Oz. 5-year warranty.