Deep Root 12" Linear Tree Root Guides $3.95, 40/$150.00 Deep Root 18" Universal Tree Root Barriers $5.90 Deep Root 24" Universal Tree Root Barrier $7.15 Deep Root 36" Universal Tree Root Barrier $13.28 Deep Root 48" Universal Tree Root Barrier $17.68 Need more information? Please feel free to contact us at 1-800-592-6940 - Ask for Extension 547 or Internet Sales.