Features: 1.Made of high quality material, durable and long lasting. 2.Quadruple filtration system, 24-hour uninterrupted circulation filter layer to intercept various impurities, protect the health of pets and It can soften the water quality 3.Not only keep both the water and cat flower fountain clean, but also help reduce the risk of urinary tract infections. 4.According to your pet's drinking frequency and the number of pets using the fountain, change the filter every 2-4 weeks. 5.Use Recommendation: Please soak the filter in water for 2 minutes and rinse it thoroughly under running water before use. Notice: Please allow 1-3cm deviation due to manual measurement Actual color may be slightly different from the image due to different monitor and light effect Description: Material:Premium Active Carbon, cotton and resin Size:125mm