PRB25-IN-4 - Filter Cartridge - Dynamic Series II & III - RTL/RCF, Series I - Model RDC, Series IV - DFM, DFML, Waterway - 17-2325 - Pleatco - UPC - 90164250106 - Height: 13 5/16 - Diameter: 5 - TopID: 2 1/8 - BottomID: 2 1/8 - Misc: C-4625 - PRB25-IN-4