RAINBOW / PENTAIR DYNAMIC 25

Replacement filter 25 square feet, equivalents on the market are Filbur (FC-2375) Unicel (C-4326) & Pleatco (PRB-25-IN). Diameter 4 15/16'' Height 13 5/16''. Top and bottom 2 1/8'' opening. Manufacturers using this filter: Artic Spas, Beachcomber Spas, Coast Spas, Coleman Spas, Leisure Bay Spas, Maax Spas, Pentair Pool Products, Sun Ray Spas, Viking Spas and Waterway Plastics.