General description Keep your pet healthy with our 8 Pack Cat Water Fountain Filters. Made from high-quality polymer activated carbon, these filters effectively eliminate bad taste and odor, ensuring that your pet's fountain water remains fresh and safe for drinking. Technical specifications Filter size: 12.5 cm (diameter) Inner diameter: 3.5 cm Compatibility and accessories Compatible with 1.6 l, 2.0 l, and 2.4 l drinkers Includes 8 premium filters for cat and dog fountains Usage Replace the pet fountain filter cartridge every 2-3 weeks to ensure fresh water for your pet.