Enpurion FlexBasin (TM) Stormwater Catch Basin Insert, COMPLETE 18" x 24" x 18" deep with frame, liner and Enpurion MT metals / oils treatment media. These are suitable for industrial and commercial stormwater treatment in parking lots with transportation and architectural sources of metals (zinc, copper and lead) and oils. Our most popular product! It's a drop-in starting point solution for most industrial applications.