Recycled plastic wren house does not crack, peel, chip, rot or warp. Utilizes recycled plastic which is composed of post consumer waste and packaging. Keeps plastic out of landfills, and prevents deforestation. Attracts smaller birds such as wrens and chickadees. Hinged roof allows easy opening for viewing and cleaning. Plenty of ventilation and drainage. Small hole size excludes sparrows and starlings entrance hole measures 1-1/8-inch. Lifetime guarantee for workmanship. Measures 8.25-inch by 6-inch by 7.5-inch.