New York Wire 30853 Fiberglass Insect Screen, 72"X100'A finer mesh fiberglass to protect against no see um, gnats, sand flies, and other tiny insects common in low marshy and coastal areas. Highlights : Mesh: 20 x 20 Diameter: . 013 100' Rolls Widths: 72" Polywrapped Woven in a finer mesh with small holes designed to provide protection from small flying insects Used for porches, patios, doors and windows WARNING: This product can expose you to chemicals including Antimony oxide (Antimony trioxide) which