The Heath Plastic 12 Room Purple Martin Bird House (PH12) offers a state-of-the-art bird sanctuary that is ready to welcome a lot of Purple Martins. It features a two story house which has twelve incredible rooms. It is properly ventilated to provide a fresh and cool nesting area, and it is specially built with drain holes to prevent moist. To protect your young martins, the bird house is perfectly constructed with guard rails. Other than that, the unit is resistant to ultraviolet rays and its color will not fade easily.