Protect curb inlets from sediment-laden stormwater runoff with Ultra-CurbGuard Plus. Quick and easy installation. The modular design allows you to build to any length. 3' long units can be quickly and easily connected to form longer lengths. The wedge-shaped, heavy-duty foam secures unit in curb inlet. Made of woven, polypropylene material provides high flow rate and will not cause ponding or flooding. Measures 4" Dia. x 36" L. Helps comply with NPDES, 40 CFR 122.26 (1999).