They may look like massive boulders, but you can easily move these artificial rocks to hide posts or pipes. Our artificial rocks save you the expense, yet retain the look, of real boulders. The Thermostone-plastic, replicated landscape rocks enhance your yard and cover eyesores such as utility boxes, sewer cleanout pipes, well assemblies, and pool filters. The artificial rocks come with four flanges to secure them into the ground so they won't blow away in a storm; just cover the edges with mulch, grass, or flowers. And these landscape rocks won't crack in cold weather. Made in the USA. Mini Rock is to hide 3"-6"-tall curbstops, cover irrigation and lighting control panels. Medium Rock covers a wellhead, pressure tank or septic pipe Jumbo Rock covers septic risers and covers manhole covers. Short Rock is to cover well/septic pipes up to 18" tall. Long Rock is to hide irrigation or pond pumps. Tall Rock is to cover well/septic pipes up to 24" tall. Utility Rock is to cover well ports or tall electrical boxes. Super-Size Rock is to cover well assemblies, electrical transformer, pool filters. Benefits of the Landscape Rocks: Enhance your landscape design with our lightweight artificial rocks Artificial rocks are the perfect solution to cover yard eyesores like pipes or pump equipment Our natural-looking rocks are durable and can stand up to cold without cracking