High Quality Screen： Cause we heard the feedback of our window screen frame, window screen mesh and window screen mesh , we improved the FLYZZZ Expandable Window Screens, this type window screen frame are suitable for double-hung windows Easy to Install：Two-layer Adjustable Sliding Window, Easy to install in seconds without the need of tools or fasteners. The unit comes completely assembled, so all you need to do is place in the window opening and adjust the width， then close the window so the window and the FLYZZZ Sliding Window Screen fit well Enjoy The Fresh Air: FLYZZZ Window Screen let fresh air and breeze in, and while keeping the room quiet. Our window screen's mesh is made of high-density Fiberglass material and white aluminum box frame the top and the bottom's Weatherstripping are longer than before, easy and cheap, strong and durable, also can be used for the family with cats. Many Sizes Can be Chosen : we are manufacturer and seller, we have many size to choice, to fit many windows, find it from our FLYZZZ brand store, this window screen horizontal dimensions size is 10" x 19" , can be expend to 36" wide. We offer you 100% satisfaction guarantee and 24 hours service, If you're not completely satisfied with your purchase simply let us know and you'll be offered a full refund or replacement., Manufacturer: Xiamen Weiziran Indurstry&Trder,co,ltd