yoochee 2 pack expandable window screen, adjustable medium window screen (15" h x 21" - 38" w) - replacement window screens with frame, durable replacement screen for window, window screen mesh yoochee yoochee expandable window screen will make you feel free to open the window, allowing fresh air.<br><br> feature : <br> - high strength aluminum frame:<br> more durable, not easy to deformation<br> - fiberglass screen mesh: <br> this mesh is 18 x 16 (apertures per square inch) <br> - premium weather stripping: <br> the felt weather stripping is used to fit more closely with the window<br> - easy to install: <br> 1.open the window<br> 2.insert the window screen<br> 3.expand it to the appropriate width<br> 4.close the window<br> - 2-ways instructions: <br> 1.find and use tool(include) to remove set screw <br> 2.slide the two screen panels apart<br> 3.reinsert guide pieces into the opposite frame channel<br> 4.close the screen and reinsert set screws<br><br> package include :<br> - 2 × expandable window screen<br>