This beautiful hand-made bluebird house is made of recycled poly lumber. It features all screwed construction using stainless steel screws and has routed edges. This house will not crack, split or fade - it will look great for years to come. The colors are vibrant and UV protected. The side-opening door offers easy access for cleaning/monitoring. The back panel allows for easy mounting to a tree or post and the predator guard is attached to the 1-1/2" hole.