This is a practical and appropriately designed Flicker Woodpecker house with a 2 1/2 in. entry hole. Sturdy gable roof construction with side cleanout. Please mount in a tree 10-20 feet above the ground. Made of heavy inland cedar. Sturdy gable roof construction. Strong screw assembly with zinc chromate screws. This is a beauty! If you haven't seen this well received volume yet, please take a few minutes to learn more about Woodpeckers...their habitats, biology and environment here.