Length: 10-1/8"Diameter: 5-5/16"Top opening: 2-1/8"Bottom opening: 2-1/8"   Replaces popular brand part numbers: Unicel: C-5345RA Filbur: FC-2970M Pleatco: PLBS50-M  Features: 50 sq. ft. of high-quality filtration fabric Exclusive Expansive Flow™ core Alternative filter names: 817-0014, 173584, R173584, S2 Spa, G2 Spa, 17-175-2198, APCC7147, 14513, 10419, 090164824307, SD-01249, PLBS 50, PLBS50 MB, PDC530-AFS Used in pools/spas made by: Bahama, Dynasty Spas, Garden Leisure Spas, Leisure Bay Spas, Pentair Pool Products, Rainbow Plastics, Rec Warehouse, Rocky Mountain, Waterway Plastics and other manufacturers   By Guardian Filtration Products • 510-230M