Feature: Perfect match: Compatible with Catit/PEDY/Aerb, from 1.5L to 2.5L flower fountains and other fountains of the same size. Dimensions: 5.0 inches (diameter), 1.45 inches (inner diameter). Please check the size of the water dispenser card slot before buying. Double-effect filter: On the one hand, the resin can absorb hair and coarse dirt in the water, soften the water body, and reduce the possibility of stone formation. On the other hand, activated carbon can remove the peculiar smell in the water, and the fresh water is always enriched with oxygen through the circulation, ensuring that there is sufficient water for your baby. Water quality can be removed by four filtering methods. The outer cotton layer on each filter traps hair and debris. The four filtration steps can ensure the quality of the water and improve the taste of fresh water for your cat. How to use and packaging include: Before use, rinse the filter thoroughly with water, and then gently connect it to the water dispenser. To ensure the cleanliness of the water, the filter must be replaced in time. Please replace within 2 to 4 weeks. 8 * Cat Flower Fountain Replacement Filter Friendly service: Our filters have high performance and high quality. But if our products have any quality problems, please feel free to contact us. We provide you with the most friendly customer service. specification: Product size: 5.0 inches (diameter), 3.8 inches (inner diameter) package: 8 * Pet water dispenser filter 12 * Pet water dispenser filter Our advantage: 1. Our products are made of food grade resin. 2. Active filtering. Will not harm your pet. 3. Our filter element can soften water quality. Keep your pet away from hard water, repel urinary tract stones, filter out harmful minerals, and avoid bacterial growth. 4. Eliminate odors and make your home look new.