This Adjustable Window Screen is easy to install in seconds without the need of tools or fasteners. It can be used in wood, metal or vinyl double hung windows. The screen has a 5/16 inch (7.9 millimeter) silver color frame, fiberglass screen wire, and black retainer spline. The adjustable screen has a width adjustment approximately of 31 to 59 inches. The unit comes completely assembled, so all you need do is place in the window opening and adjust the width.