More Happy Moments By keeping your pet hydrated, you and your pet can enjoy playtime more and live happily together. Characteristics: Material: Activated Carbon Filter Size:2.2 x 3.3 inches Filter Weight: 0.39 oz/pcs Package includes: 6 x Filters + 6 x Sponges Features: Top quality PP microporous filter material and high performance activated carbon. Individually packaged in a plastic bag and sealed to maintain high quality. Help to increase water consumption and reduce the risk of urinary tract infections. Changing a new filter after 2-4 weeks of use is required for keeping the water running fresh. Notes: Please rinse filter with water thoroughly before use. Replace more frequently if multiple pets use the fountain A small amount of carbon dust may be released which is not harmful to your pet.