This is a DE4820, FNS and Nautilus compatible 48 square foot partial D.E. Filter Grid measuring 24 inches. This grid fits Hayward Pro-Grid DE4820, Pentair FNS, Nautilus NS and Nautilus Plus NSP 48 square foot filters.
Our generic OEM 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 over OEM units.
