PoolQuip Complete 60 DE Grid Set. Size:11”W x 30”L; Filtration area:60 sq. Ft; Package includes Universal 7 full + 1 partial grid SET. Replacement grids: Unicel FS-2005, Filbur FC-9550, Darlly DGS-1130, Hayward, American, Pac Fab, Pentair, Jandy, Waterway. DE filters require less pumping power than other types of filters, so utility costs are lower. Filtration Performance: Remove sand, suspended solids and solid particles in the pool water to make the pool water clear and transparent. LONG LIFE: PoolQuip Filter material is high density polyester fiber, high temperature resistance, and can work in medium alkali and medium acid environment.