UltraTech polypropylene Geotextile Ultra-Drain oil and sediment guard with curb-insert style. Stop oil, sediment and other debris from entering curb inlets and catch basins. For use with combination catch basins with a street grate and curb opening. Heavy-duty tension rod secures drain guard inside curb inlet - stopping sediment and other contaminants from entering curb portion of storm drain. Helps comply with NPDES, 40 CFR 122.26 (1999) and TMDL requirements. For 24-inches - 42-inches curb inlets.