Optimum Pool Technologies Filter Replacement for Pentair Clean & Clear 100; 100 SQ.FT. Cartridge Element Made with 100% Reemay, a spunbond polyester filtration media that was made specifically for durability and antimicrobial protection. Replaces Pentair CC100 Cartridge Element (CC-100) Outside Diameter: 10-1/16, Length: 23-5/8 OEM# R173215, Unicel# C-9410, C9410 Includes support bands around each cartridge element.