Filter Cartridge Spaform PRB17.5SF

Hot Tub Filter PRB17.5 SF PAIR Equivalent replacement to the following filters: Blue Devil – 6456 Filbur – FC-2386 Unicel – C-4401 Our PRB17.5SF filter will fit the following spa brands: Spaform Spas Catalina Spas Sundance Spas Beachcomber Hot Tubs Dynasty Spas Freedom Spas Vita Spas Thermo Spa Hydro Spa – After Hours Spas Measurements: Top Diameter : 5” (127mm) Length : 4 5/8” (117mm) Top Hole : 2 1/8” (54mm) Bottom Hole: 2 1/8” (54mm) Media (Sq. Feet) : 17.5 per Filter, 35 per pair