Ultimate Renewable® bamboo feeders and houses are made with eco-friendly bamboo. Bamboo is fast-growing, durable, and naturally insect, squirrel, and weather resistant, making it not only the perfect choice for quality products, but environmentally friendly and an ultimate renewable resource. The hole size is specific to wrens and prevents larger birds from entering. Fully assembled and easy to hang with attached jute rope from small branches or hooks. Featuring an easy open side panel for seasonal cleaning. Mount the front of nest box east to southeast and mount or hang at a height of 5-to ft. on a fencepost or shepherd hook.