Built of aluminum, a 12-room house weighs only eight pounds. These houses are designed to be mounted on the MP-15 telescoping pole. Easiest to clean. The apartment floors snap-out for easy cleaning. The hexagonal design is both functional and artistically attractive. New deluxe models also include porch rails to help prevent young martins from falling out of the nest. Comes unassembled for shipping. Assembly required. 26-1/2" diameter.