Frost King WB Marvin 25 45 in. W in. Steel Adjustable Window Screen, Pack of 12Frost King's W. B. Marvin Adjustable Window Screens are the affordable alternative to custom screens. It easily expands to fit your window and installs without tools. Its fast and easy to install. And removes just as easy. They are available in numerous height and width configurations to provide that perfect fit. Fits all sash windows Provides airflow while keeping insects out No tools required Easy gliding rails allow for fingertip adjustment Bright