Expandable Dual House Design: Includes 2 plastic purple martin houses, each with 12 rooms, offering up to 24 rooms total for your martin colony. Versatile Setup: Can be used as 2 separate houses or combined together for an expanded space, perfect for attracting more martins. Triangular Opening for Easy Mounting: Designed for use with the BestNest S&K Telescoping Purple Martin House Poles (pole not included), featuring a triangular opening for secure placement. Durable Plastic Construction: Made from high-quality plastic, these houses are built to last and withstand the elements, providing a safe environment for purple martins. Blends with Nature: The green, tan, and white color scheme allows these houses to blend seamlessly with the outdoor environment. The S&K Dual Purple Martin Houses with an expandable option offer the ideal shelter for your purple martin colony. This set of 2 plastic houses provides 12 rooms per house, totaling 24 rooms for your feathered friends. The versatile design allows you to either keep the houses separate or combine them for a larger space. Each house features a triangular center opening, designed to be mounted on the BestNest S&K Telescoping Purple Martin House Pole (not included), ensuring a secure and stable setup. Crafted from durable plastic, these houses are built to endure all weather conditions, providing a safe and comfortable environment for martins to thrive. The green, tan, and white colors blend effortlessly with natural surroundings, making these houses a beautiful addition to your outdoor space. Whether you're starting a new martin colony or expanding your existing one, these houses are the perfect choice for bird enthusiasts.