Contemporary styled Going Green® recycled plastic feeders and houses made from 90% recycled plastics. Designed for easy maintenance and the recycled plastic doesn't absorb water. The hole size is specific to wrens and prevents larger birds from entering. Fully assembled and easy to hang from small branches or hooks with sturdy attached metal cable Featuring an easy open side panel for seasonal cleaning. Mount nest box approximately 4 feet to 5 feet high on a pole, baffled wood post or tree.