Pool Filter 4 Pack Replacement for Pentair Clean & Clear PLUS 420; 105 SQ.FT. Cartridge Element Made with 100% Reemay, a spunbond polyester filtration media that was made specifically for durability and antimicrobial protection. Pentair CCP420 Cartridge (Filter PN 160301) Outside Diameter: 7, Length: 26-1/16 OEM# 178584, (R)173576, Unicel# C-7471 / C7471 , Pleatco# PCC-105 / PCC105, Filbur# FC-1977 / FC1977 Includes support bands around each cartridge element.