Length: 4" Diameter: 4 -1/4"Top Opening: 2-1/16"Bottom Opening: 2-1/16"    Replaces popular brand part numbers: Unicel : C-4310  Pleatco: PWW10 Filbur: FC-3077  Features: 10 sq. ft. of high-quality filtration fabric Exclusive Expansive Flow™ cores Alternative filter names: CX200-RE , C-4620 , FC-0645, C-200RE, Hayward C-200, Hayward MicroStar-Clear, American Commander II, 17-175-1035, 17-175-1308, PA20, PA 20 Used in pools/spas made by : Accent Spas, Arctic Spas, Blue Falls Mfg. Ltd., Charisma Spas, Custom Molded Products, Cyanna Valley Spas, Diamante Spas, Endless Pools, Hollibaugh Spas, Icon Spas, Image Spas, Keyes Spas, Leisure Bay Spas, Leisure Manufacturing, Pdc Spas, Rec Warehouse, Sonoma Spas, Superior Spas, US Tooling & Spas, Waterway Plastics, Weslo   By Guardian Filtration Products • 404-200-02