Tree Root Barrier - 36 inch - Heavy DutyTree Root Barrier 36 Commercial Grade Ultimate protection for extreme conditionsengineered for the most demanding applications. Why It Works Constructed from 100 mil (2. 5 mm) recycled HDPE with exceptional 200 lb puncture strength (ASTM D 4833)built for the most aggressive root systems. At 36 deep, this is our maximum protection barrier, designed to stop even the most invasive trees from damaging critical infrastructure. The extra thick, flexible
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