This expandable window screen fits windows ranging from 21 to 40 inches. It is easy and quick to install, featuring a high-transparency mesh that allows natural airflow. The felt edges further enhance the seal. The track is made of heavy-duty metal, ensuring durability and smooth gliding with frequent use. | Vevor | | Adjustable Window Screen, 15" H x 21" | 40" W, 2 Packs Expandable Windows Screens with Aluminum Frame and Durable Mesh | White | Best Buy