Pool Filter 4 Pack Replacement for SwimClear C-3025 / C-3030; 81 SQ.FT. Cartridge Element Made with 100% Reemay, a spunbond polyester filtration media that was made specifically for durability and antimicrobial protection. Replaces SWIM CLEAR C-3025; 81 SQ.FT. pool filter Outside Diameter: 7, Length: 19-5/8 OEM# CX580XRE, Unicel# C-7483, Pleatco# PA-81, Filbur# FC-1225 Includes support bands around each cartridge element.