The quality you expect with the performance you need, so you can enjoy your pool worry free. Dimensions and specifications of the cartridge. Of filtration area, media is 4 oz, Total Filtration 248 SQFT. 3 Top and bottom Inside diameter (open hole). Nominal dimensions: 14″ L x 7″ OD x 3ID. End caps are both open with polyurethane material to provide high impact and perfect seal, our core is injection mold creating more stability than drilled PVC pipe. Hayward SwimClear C2025, C2020, CX480XRE PA56SV. Cartridge meets OEM specifications. This Package contains 4 Cartridges.