RAINBOW / PENTAIR DYNAMIC 50

Replacement filter 50 square feet, equivalents on the market are Filbur (FC-2390) Unicel (C-4950) (Pleatco (PRB-50-N) Cal Spas (FIL11100221). Diameter 4 15/16'' Height 13 5/16''. Top and bottom 2 1/8'' opening. Manufacturers using this filter: Cal Spas, Coast Spas, Strong Spas, Jacuzzi Premium Spas, Leisure Bay Spas, Pentair Pool Products, Sundance Spas, Viking Spas , Waterway plastics.