The 1.5" Hercules Stone Retaining Wall with Irrigation Knockout in Gray is designed to offer both durability and functionality for your landscaping needs. Made from high-quality engineered concrete, this block ensures strength and longevity while providing a sleek, modern gray finish. The built-in irrigation knockout feature makes it easier to install irrigation systems directly through the retaining wall, allowing for seamless water delivery to plants and landscaping behind the wall. Ideal for retaining walls, garden borders, and pathways, this versatile block is perfect for both residential and commercial projects.