The Flush Fin frame option is designed to simplify the installation process for contractors in southwest market areas. The 100 Series Flush Fin product features an integrated fin that allows for easy installation of a unit over an existing aluminum window frame in stucco application without disturbing the stucco exterior. With the exterior fin covering both the old frame and stucco, the window provides a clean exterior finish in addition to performance. As a result, the installation process is significantly faster and less disruptive for both homeowners and contractors.