Heath Aluminum 18-Room Deluxe Martin Houses, Set of 2 round adapter for triangular bird house poles combine this pair of homes

combine this pair of homes for a larger structure to create a single

25" diameter entrance is accompanied by a perch rail and drainage holes

With a few alterations

Triangular telescoping pole (not included) goes through the center of the homes for stability

Porches beneath each entrance create takeoff and landing spots for birds

Heath Aluminum 18-Room Deluxe Martin Houses, Set of 2 round adapter for triangular bird house poles combine this pair of homesProvide several comfortable roosting spots for purple martins to colonize with these Heath Aluminum 18 Room Deluxe Martin Houses. Pair of top quality martin houses allows you to host these wonderful birds in your own backyard. Each home sports 18 trapezoid shaped apartments measuring 9 wide at the front, 3 wide at the back, 6 deep, and 6 tall to provide ample space. Rust free aluminum construction, along with crisp white and green color, provide hardy