Also replaces the following filters: --Unicel - C-5397 (C5397) --Filbur - FC-2972 (FC2972) --Pleatco - PLB-S-100 (PLBS100) Popular brands: Leisure Bay Spas Pentair Pool Products QCA Spas Rainbow Plastics Rec Warehouse Waterway Plastics Alternative filter names: 817-0016, 303434, R173601, S2 Spa, G2 Spa, AK-40083, AK40083, 17-175-2203, APCC7293, 19930, APCC7487, PLBS100, PLBS 100