Two Pack ANTIMICROBIAL/ANTIBACTERIAL MADE IN THE USA New in Factory Packaging (Please scroll to see full detail) Measurements: Length 14 13/16" Outside Diameter: 5 5/16" Top Opening: 2 1/8" Bottom Opening: 2 1/8" SQ FT Media - 65' Popular brand part numbers: Unicel - C-5374 (C5374) Filbur - FC-2971 (FC2971) Pleatco - PRB-S-75 (PRBS75) Also replaces the following filters: Cal Spas Leisure Bay Spas Maax Spas of AZ Pentair Pool Products Rainbow Plastics Rec Warehouse Waterway Plastics Alternative filter names: 817-0015, 303433, R173600, S2 Spa, G2 Spa, AK-40081, AK40081, 17-175-2201, APCC7256, 17540, APCC7256M, PLBS 75, PLBS75-Z, PLBS75 MB, 17540