Unicel 8-Pack 25-sq ft Pool Cartridge Filter

This FS 2002 complete filter grid set comes with 7 full + 1 partial grid that can be used as an American, Hayward, or Pac Fab replacement. They are 12" long and 11" wide with 24 Sq. Ft. filtration.??? Unicel FS 2002 Replacement Filter Grid Complete Set? 24 square ft. filtration? American, Hayward, Pac Fab replacements? Width: 11"? Length: 12"? Part Number: FS 2002