Need Help With My Pentair DE grids.

I need to replace my DE grids in my filter i just dont know the size i need. Attached is the picture of the side of the filter housing.

The 180009 part number on the label identifies the filter as a 60 sq ft Pentair FNS Plus. The grid set is part number FG1005PACK.

Thanks that helps a lot. I will be ordering that part pretty soon.

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