Open your windows with confidence when you use this Frost King Adjustable Window Screen. This coated metal screen fits all sash windows and keeps flying bugs out of the house. This metal window screen has a durable construction that resists tears and weather so it can be used for years. The metal rails and varnished wood give it a clean look and it allows air to flow through from the outside. It s easy to install and can be adjusted to fit the width of the window. Frost King Adjustable Metal Rail Screen.