Photo 1 of 21-Piece Cat Fountain Filter Replacement Kit: Includes 16 Filters, 4 sponges, and 1 Brush. Features Double The Activated Carbon and ion Exchange Resin, Fitting Fits Most pet (not Compatible Catit).

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Photo 1 of 21-Piece Cat Fountain Filter Replacement Kit: Includes 16 Filters, 4 sponges, and 1 Brush. Features Double The Activated Carbon and ion Exchange Resin, Fitting Fits Most pet (not Compatible Catit).Photo 2 of 21-Piece Cat Fountain Filter Replacement Kit: Includes 16 Filters, 4 sponges, and 1 Brush. Features Double The Activated Carbon and ion Exchange Resin, Fitting Fits Most pet (not Compatible Catit).