Woodlink's cedar wren and chickadee house is ornithologically designed to attract these species. The house features and easy open side to make cleaning easy. The green painted roof and etched design front make this house even more attractive. The 1/8th-inch hole is ideal for wrens and chickadees. The house is constructed of reforested, kiln dried, inland red cedar and screws. The birdhouse is predrilled for easy mounting with screws which are included. Made in the USA.Entry Hole: 1-1/8". Natural Cedar, green stained roof. Side opens for easy cleaning. Comes with mounting hardware and instructions. Proudly Made In The USA.