Full set of grids for 36 sq. ft. DE filter
Includes 7 full grids (18" x 11") and 1 partial grid (18" x 9 3/4")
 
Full set of grids for 48 sq. ft. DE filter
Includes 7 full grids (24"x11") and 1 partial grid (24" x 9 3/4")
 
Full set of grids for 60 sq. ft. DE filter
Includes 7 full grids (30"x11") and 1 partial grid (30" x 9 3/4")