Identify your drainage structure View examples of Flexstorm installed in this type of drainage structure Cast Iron Frame and Grate Select View examples of Flexstorm installed in this type of drainage structure Precast Concrete Structures with Grates Select View an example of Flexstorm installed in this type of drainage structure Open Throat Curb Inlets Select View examples of Flexstorm installed in this type of drainage structure Nyloplast Castings Select For a list of our field dimensional order forms, click here.