Unicel FS-2002 Replacement Filter Grid for American, Hayward, Pac-fab 7 Full + 1 Partial Set (Discontinued by Manufacturer) by Unicel - Distribution Unicel FS 2002 Replacement Filter Grid Complete Set 24 square feet filtration American, Hayward, Pac Fab replacements Dimensions: 11 x 12 inches Note: Collar has open slot (2 notches). Length is measured from one end of the grid to the other (collar not included)