Pool Filter 4 Pack Replacement for Pentair Clean & Clear PLUS 520; 125/130 SQ.FT. Cartridge Element Made with 100% Reemay, a spunbond polyester filtration media that was made specifically for durability and antimicrobial protection. Pentair CCP520 Cartridge (Filter PN 160332) Outside Diameter: 7, Length: 32-1/16 OEM# 178585, r178585, Unicel# C-7472/C7472, Pleatco# PCC-130/PCC130, Filbur# FC-1978/FC1978 Includes support bands around each cartridge element.