Prevents silt, sediment and hydrocarbons from entering storm drains

Provides visual indicators to storm drain locations

Helps comply with NPDES, 40 CFR 122.26 (1999) when used as Best Management Practice in Storm Water Pollution Prevention Plans.

Two standard sizes: Part # 9292 fits up to 24" x 24" grates. Part # 9293 fits up to 4' x 6' grates.