PACKAGE INCLUDES: The package includes 24 packs of cat fountain filter replacements and 24 sponges. Each filter and sponge is individually wrapped and sealed for convenient storage and daily use. Depending on your pet's water consumption and the number of pets, we recommend cleaning the pet fountain filter once a week and replacing it 1 to 2 times per month to maintain fresh and clean water. PERFECT MATCH: The cat fountain filter measures 2.99 x 1.69 inches, and the sponge measures 3.1 x 1.1 inches. This size is compatible with most 67oz/2L, 101oz/3L, 108oz/3.2L, and 135oz/4.0L stainless steel pet fountains available on the market. Please verify compatibility with your specific fountain before purchasing. EASY TO USE: These pet fountain filter replacements are simple to install and remove, saving time and effort. Before use, soak the filter and sponge in water for at least 3 minutes to activate optimal filtration performance, then rinse thoroughly under running water. This helps extend the freshness of your cat's drinking water. TRIPLE FILTRATION SYSTEM: The cat water fountain filters are constructed with activated carbon, ion exchange resin, and non-woven fabric, creating a triple filtration system. This combination effectively removes impurities such as pet hair, food debris, and odors, while softening the water and improving its taste and overall quality to support your pet's health. RELIABLE MATERIALS AND SERVICE: These cat fountain filter replacements are made from safe, high-quality materials that do not compromise your pet's health. We are committed to your satisfaction and provide dependable customer support. Color: White & Black Material: Cotton cloth Package Contents: 24 x Filters, 24 x Sponges Note: The package includes only the items listed above. Other products are not included. Lighting and display differences may cause slight variations in the color of the item as shown in images.