The Allan Block Geogrid is a versatile and reliable landscaping tool that will transform your outdoor space. Designed with durability in mind, this black geogrid is perfect for reinforcing and stabilizing soil, making it ideal for retaining walls, patios, and walkways. Available in two different roll sizes. 3'x50' biaxial grid covers 153 square feet. 4'x50' biaxial grid covers 198 square feet. Please allow 7-10 business days for processing and delivery. Special orders may take over a month.