Length: 8 15/16" Diameter: 17 3/8" Top opening: 4" Bottom opening: 4" Replaces popular brand part numbers: Unicel C-8409 Filbur FC- 1285 Pleatco PA90 Features: 50 sq. ft. of high-quality Filtration Fabric Expansive Flow™ core High-strength Guardian banding Alternative filter names: CX900-RE,  25230-0095S,  C-900RE,  Hayward Star-Clear Plus C-900,  Sta-Rite PXC-95,  17-175-1331,  APCC7265, 19002,  090164900049,  SD-00549,  APCC7452,  PA 90,  PA90-4,  Used in pools/spas made by: Hayward , Pentair Pool Products, Sta-Rite and other manufacturers   By Guardian Filtration Products • 817-175