Length: 19"Diameter: 8-1/2"Top: 2-3/16" slipBottom: 2-3/4" hole (beveled edge)    Replaces popular brand part numbers: Unicel C-8326 Filbur FC-2780 Pleatco PSD125-2000 Features: 125 sq. ft. of high-quality Filtration Fabric Expansive Flow™ core Break-resistant Guardian banding Alternative filter names: 6540-488, 6540-501 and 6540-502 combo, 17-175-3230, 6540-505, APCC7435, 22507, 6473-165, Sundance MicroClean II, Sundance MicroClean 2   Used in pools/spas made by: Sundance Spas, Sweetwater Spas and other manufacturers   By Guardian Filtration Products • 819-199