Pool Filter Replacement 4 Pack for SWIM CLEAR C-4025/C4030; 425 SQ.FT. Cartridge Element (Pack of 4) Made with 100% Reemay, a spunbond polyester filtration media that was made specifically for durability and antimicrobial protection. Replaces SWIM CLEAR C-4025; 106 SQ.FT. pool filter Outside Diameter: 7, Length: 25-1/2 OEM# CX880XRE, Unicel# C-7488, Pleatco# PA-106, Filbur# FC-1226 Includes support bands around each cartridge element.