With over 50% more clarity than standard Andersen insect screens, Andersen TruScene insect screens are virtually invisible, so the view from your windows is as clear as all outdoors. And, because they practically disappear in your windows, they don't detract from the beauty of your home. TruScene insect screens are made with a micro-fine stainless steel mesh that is one-third the diameter of standard insect screen wire to let more fresh air and sunlight in, while keeping some of the smallest insects out. Smooth operating fasteners make it easy to attach and remove and a stone color frame complements the natural wood interior of your window. This insect screen fits Andersen 400 Series and 200 Series awning windows.