Handcrafted by Duncraft, "poly-lumber" looks like wood and has a wood-grain finish but it's durable, recycled plastic. Recycled plastic lasts for years and will never fade, crack or warp. And it's more hygienic than wood—won't harbor parasites.
Attaches to your window with two strong suction cups. Attracts small birds such as chickadees, nuthatches, titmice and wrens. Entry hole is 1-1/2 inches, house is 6 x 9 x 7 inches deep.