Cat Fountain Filters, 4/8-pack, Multi-layer Carbon Replacement Filters. Keep Your Pet Hydrated with Consistently Fresh and Clean Water Using Our Premium Replacement Filters, Perfectly Compatible with 81oz/2.4L Round Flower Pet Water Fountains. These Top-notch Filters Ensure a Constant Supply of Purified Water, Crucial for Your Pet's Health and Happiness. Equipped with an Advanced Multi-layer Filtration System, These Filters Utilize Dual-density Cotton, Ion Exchange Resin, and Activated Carbon from Coconut Shells for Comprehensive Water Purification. Easy to Install, You Simply Need to Soak the Filter for Five Minutes and Rinse Thoroughly Before Use. To Ensure Maximum Effectiveness, Replace the Filter Every Two Weeks and Clean the Pump Every Three Days if You Have Multiple Pets. Individually Wrapped for Freshness, Our Filters Promise the Highest Quality Water, Providing Assurance and Care for Your Pet. Features - Compatibility: Designed for 81oz/2.4L Round Flower Pet Water Fountains - Materials: Activated Carbon, Coconut Shell, Cotton, Resin - Dimensions: 6.4D X 5.38W X 5.2H Cm - Weight: 272 Grams - Lifespan: Effective for Use Up to 12 Months - Benefits: Minimizes Sediment for Cleaner, Healthier Water.