Looking to conceal sprinkler junctions, back flow, power sources, or other large and unsightly items in your yard? Our Fiberlite Medium Rock is a realistic-looking fiberglass option to conceal distractions. Rocks are fiberglass-based, hollow products and molded to look like natural stone, plus they are extremely durable and lightweight. Fiberlite boulders are coated with exterior-grade acrylic and U.V. protection, making them safe from moisture and temperature variations. With such a realistic stone appearance, it will simply look like you have added a beautiful hardscape component to your yard.