Made with 1.5cm thick cedar wood. This is a birdhouse for chickadees and varied tits, with a 2.7cm entrance hole. Setting it up early allows them to get used to it and nest more easily. The entrance hole has been made as small as possible to prevent sparrows from entering. If sparrows get in, the chickadees will be driven out. To prevent snakes from entering and to allow wild birds to nest safely, we recommend installing it at a height of 2m or more above the ground. Back panel: 30cm Height: 23cm Width: 15cm Depth: 18cm Entrance hole: 2.7cm Mounting holes: 2 at the top 2 at the bottom Roof stopper: Roller catch: 1 *For strong wind and crow protection. Locks with a click. Drainage holes: 3 in the bottom panel If you would like to order, we will ship via Rakuraku Mercari Delivery.