Nature's Way Bird Products CWH4 Cedar Bluebird Viewing House Cedar, Bluebird Viewing House, Also Includes A Side Viewing Window To Watch The Hatchlings While Keeping Them Safe, Features Maximum Ventilation, Elevated Mesh Base To Manage Blowflies, Predator Guards Fledgling Skerfs. Features Crafted from premium cedar with a water-based protective stain Air vents allow for maximum air ventilation through wall and floor openings - Clean-out doors provide easy access for cleaning Stay-clear, crack-resistant window allows for viewing while protecting young inhabitants Predator guard extends the entrance hole to protect young birds against predators Pole mount or flush mount installation options USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.