Pool Filter 4 Pack Replacement for Pentair Clean & Clear PLUS 320; 80 SQ. FT. Cartridge Element Made with 100% Reemay, a spunbond polyester filtration media that was made specifically for durability and antimicrobial protection. Pentair CCP320 Cartridge (Filter PN 160340) Outside Diameter: 7, Length: 20 OEM# 178580, Unicel# C-7470/C7470, Pleatco# PCC-80/PCC80, Filbur# FC-1976/FC1976 Includes support bands around each cartridge element.