Unicel PG1904 FG Series 48 Sq. Ft. 9-3/4" x 24" Filter Grid Replacement Replacement for: American, Pac-Fab, Hayward, Jandy, Astral, Waterway Pair with 7 Full Grids (FG1004) for complete set 24" long 9-3/4" wide 48 sq. ft.