Amazon.com : Cat Mate Replacement Filter Cartridges : Pet Self Waterers : Pet Supplies
Amazon.com : Cat Mate Replacement Filter Cartridge for Cat Fountain 2 Pack - Pack of 3 : Pet Supplies
Compatible Pet Mate Replacement Filter Cartridgers for Water Fountain
Petmate Water Fountain Replacement Filter - 6 Pack
Amazon.com : Genuine Replacement 3 Stage Filter Cartridges | for Use With Dog Mate and Cat Mate Pet Fountains Models 335, 385, 410, 411, 412 and 413 | 4 pack : Pet Supplies
Cat/Dog Mate Pet Fountain Replacement Filter Cartridges 2pk