Unicel 7 FG-1004 D.E. Replacement Filters Full Grid 48 Sq Ft 24" FG1004 FC-9340 Replacement for: American, Hayward, Pac-Fab, Sta-Rite, Jandy, Astral, Waterway, Jacuzzi 24 inches long and 11 inches wide 48 square feet Some filters also need a partial grid that is not included with this product (not included) Can be used as replacement: Unicel FG-1004, Hayward Filter Grids, Astrial Grids, Jandy Grids, Pentair Grids, American Products Grids, Pac Fab Grids, Sta-Rite and Waterway Grids