Filbur FC-9440 DE Grid for 48 Sq. Ft. Pool Filter Specifications: Filter Manufacturer: American Products, Astral, Hayward, Jandy/Zodiac, Pacfab, Waterway Model: 5000 Series/Titan RPM, Clarity DE 48, Crystal Water, DEL Series, Micro-Clear, Micro-Clear SS, Pacfab FNS Plus, Pacfab FNS Polymeric, Pacfab Nautilus Plus 48, Pacfab Nautilus SS, Pro-Grid, Titan CM, Titan SS Model Number: 18046, 570-0048, 58409000, CM48, DE4800A, DE480S, DE4820, DEL48, DEV48, FNS48, FNSP48, NS48, NSP48, RPM48 Total Number of Grids Required: 8 Total Grid Size (l x w)/ Type/ Qty Required: 24" x 9-3/4" Partial (1 reqd) Filbur Number: FC-9440 Unicel Number: PG-1904 Grid OEM Number: 11621R4200, 59002300, 818-3900, DEX4800DS, R0554900