Use to enhance home exterior decor - decks, porches, spas, gardens and more. Constructed of tough, high-impact resistant plastic. One-piece design ensures no separation at grid intersections. 2-3/4 in grid opening. Maintenance free. Will not rot, crack or split under normal conditions. Unaffected by chemicals, sea air and acid rain. Non-toxic, U.V. stabilized to prevent discoloration.