Rich Cat Fountain Filter Set includes 16 cat fountain filters and 8 sponges. Each filter is individually packed to preserve seal and hygiene. Filter size notes: - Filter: 7 cm x 4.5 cm - Sponge: 2.8 cm x 1 cm Compatibility - Compatible with 3.2 L stainless steel cat fountain - Compatible with 2 L adjustable water flow pet fountain Filtering performance - Multi-layer filtration uses non-woven fabric, activated carbon, and natural resin to remove fine impurities and loose hair - Outer cotton layer absorbs dirt, helping to improve water purity and taste - Provides cleaner, purer water for cats Health benefits - Softens water and reduces excess metal ions - Supports better hydration and helps prevent urinary tract diseases and urinary stones - Encourages pets to drink more water Ease of use - Soak the filter in water for 2 minutes, then rinse thoroughly under running water - Insert the filter into the corresponding slot in the water dispenser - Press lightly on the closing flap to ensure the filter is properly seated for optimal filtration and fresh water all day Practical use scenarios - In a multi-cat household using a 3.2 L stainless steel cat fountain, keeps drinking water clean and appealing - In small spaces with a 2 L adjustable water flow pet fountain, ensures effective filtration without adding clutter - For cats that drink slowly or are prone to urinary issues, helps maintain better water quality and encourages increased water intake