Fiberglass Window Screen is rust and corrosion resistant, fireproof (at cigarette temperature), wont stretch or shrink and resists impact. Fiberglass Window Screen is also available in a variety of meshes and colors. Like aluminum, standard meshes are 18x16 and the two most popular colors are silver gray and charcoal. Fiberglass screening is also available in a fine-woven 20x20 mesh used primarily in coastal areas where very tiny flying insects (no-see-ums) are a problem. For large areas such as pool enclosures, a strong 18x14 mesh is also available. Some meshes and colors of fiberglass are also available on special order in 78" and 84" widths.