DuraRocks--fake, faux and artificial rock covers and enclosures--are the most affordable and durable artificial rock products available today for covering pond filters and pumps, irrigation and backflow valves, utility boxes, septic tank lids and other unattractive objects.br br Hollow and open at the bottom, beautiful DuraRocks landscape accents are manufactured in the USA from a 100 recyclable industrial-grade, high-density polyethylene composite that is 14" thick.br br Available in a choice of two colors, the DuraRock formula features modern UV inhibitors for maximum protection from the elements and is integrally enhanced with a unique blend of gritty crushed mineral stone for a dramatically more realistic appearance than smooth-surface fake rocks made in the past that shined unnaturally in the sun.