The Ultra-Drainguard stops silt, sediment and other debris from entering curb inlets and catch basins. For use with combination catch basins with a street grate and curb opening. The heavy duty tension rods secure the Drainguard inside curb inlets-stopping sediment and other contaminants from entering the curb portion of storm drains. It fits grate sizes up to 40” x 40” and curb inlets up to 60” wide. Helps comply with NPEDS, 40 CFR 122.26 (1999).