Unicel 50-sq ft Pool Cartridge Filter

New Unicel PG-1904 Swimming Pool Vertical D.E. Filter Grid. Replacement for: American, Pac-Fab, Hayward, Jandy, Astral, Waterway. 1 Single Grid included: Pair with 7 Full Grids (FG1004) for complete set. Material area: 48 square feet. Collar has open slot (2 notches). Length is measured from one end of the grid to the other (collar not included). Product Condition: Brand New. Part Number: PG-1904. Dimensions (L x W): 24 x 9-3/4 inches. Manufacturer warranty: 1-year warranty.