FiltPool FP-2080 Replacement Pool Filter Cartridge SetCompatible with Pentair Clean & Clear Plus 320 filtration systems and replacement part numbers including Pentair 160340, CCP320, PCC80, PCC80-PAK4, ULTRA-A5-PAK4 and R173573.Also replaces: Unicel C-7470, Filbur FC-1976, Pleatco PCC80, Guardian 719-168-04 and PLFPCC80.Dimensions and specifications 80 sq. ft. filtration area per cartridge 320 sq. ft. total filtration area 4 oz filtration media 20 in. length 7 in. outside diameter 3 in. top and bottom inside diameter (open hole) Nominal dimensions: 20 in. L × 7 in. OD × 3 in. IDBoth end caps are open and made with polyurethane material for impact resistance and sealing. The injection-molded inner core is designed to provide greater structural stability than drilled PVC pipe.The cartridge is designed to meet OEM specifications.Package contains 4 cartridges.