PACKAGE INCLUDES: The package includes 24 packs of cat fountain filter replacements and 24 sponges. They are individually wrapped and sealed for convenient storage and daily use. Depending on your pet's drinking habits and the number of pets, we recommend cleaning the pet fountain filter once a week and replacing it every 1 to 2 months 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. It 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 pet fountain before purchasing.EASY TO USE: These pet fountain filter replacements are easy to install and remove, saving time and effort. Soak the filter and sponge in water for at least 3 minutes to activate optimal filtration performance, and rinse thoroughly under running water. This helps keep your cat's water fresh for longer.TRIPLE FILTRATION SYSTEM: The cat water fountain filters are made of activated carbon, ion exchange resin, and non-woven fabric, forming a triple filtration system. These materials help remove impurities such as hair and food debris, absorb odors, soften water, and improve water taste and quality, supporting your pet's health.RELIABLE MATERIALS AND SERVICE: The cat fountain filter replacements are made from safe materials that do not harm your pet. We value customer satisfaction and are committed to providing excellent customer service.Color: White & Black Material: Cotton cloth Package Contents: 24 x Filters 24 x Sponges Note: Light reflection and differences in display screens may cause slight variations between the color of the item in the image and the actual product. Measurement error allowance is +/- 1-3 cm. Only the items listed above are included; other products are not part of this package.