Roosting boxes increase a bird's chance of surviving winter dramatically by protecting it from the wind, rain and cold weather. This roosting box will accommodate most birds. Clean the box by removing the four front screws to access the inside compartment. For hanging, remove the front cover and screw into a tree or fence. Screw for hanging is not included. Made of recycled plastic. Measures 5"w x 15"h x 5"d.