S&K Manufacturing American Barn Purple Martin HouseWith the S&K Manufacturing American Barn Purple Martin House, your Purple Martins will think they have landed at the Ritz. Each of the 12 compartments is 6 inches by 6 inches. The entrances are starling-resistant. The nesting area allows for quick drainage, keeping the nest dry. The haven includes nest bowls, traction, and dry nests. The Heavenly Haven is lightweight and easy to maintain. It can be expanded to include multiple floors by adding additional houses.