Unicel FG1260 Purex Replacement Vertical DE Filter Grid 60 Sq Feet (8 Filters) Unicel FG 1260 replacement DE pool filter 60 square feet Note: Collar has single notch and is covered with a black adapter. Length is measured from collar notch to opposite end of grid Pentair Purex 2000 series D.E. filter (SM/SMBW 2060) Pentair Purex 4000 series D.E. filter (SM/SMBW4060)