This is a 24" long Unicel PG-1904 replacement for the 59002300 used in various Pentair, American Products, Pac-Fab, and Heldor filters.
1 of these partial and 7 full grids, #59002400, which are the same height but are 11-1/2" wide are used in each filter.
These filters have a total of 48 square feet of filter area.
See below for dimensions and more information.
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