Aluminum roof - choose faux patina or black. Top can be removed for cleanout of nesting material. Bottom bracket allows for mounting onto a "4x4" post (outer post dimensions 3.5" x 3.5), post not included.Find posts and more birdhouses: Better Crafter. This item is in the category "Home & Garden\Yard, Garden & Outdoor Living\Bird & Wildlife Accessories\Bird Houses". The seller is "better_crafter" and is located in this country: US. This item can be shipped to United States, Canada.