This is a Pentair Purex package of 10 SM-SMBW 2072 Filter Grid Elements 72 Square Feet. These filter elements are for SM-SMBW 2000/4000 Series D.E. Filters.
These grids are injection molded from 100% virgin, high impact styrene then covered with multi-filament polypropylene fabric. Each grid has been engineered with subtle design improvements specifically for this model and manufacturer.
