Perfect Match - Designed for round pet water fountain with a 2L/67oz capacity. Please confirm the capacity and product model before purchasing. Advanced Triple Filtration System - Composed of a cotton layer, activated carbon, and ion exchange resin. This filter effectively removes hair and heavy metals, improving water quality and providing your pet with purified and healthy water. High-Density Pre-Filter Sponge - Further enhances filtration by capturing additional impurities, ensuring optimal filter performance. The high-density 8D filter sponge prevents debris from entering the pump and helps prolong the life time of water pump. Individually Packaging - Baofum dog water dispenser filter are individually packaged and sealed to ensure that the cartridges are not contaminated before use. Tips Before Use - Soak the filter for 5 minutes and rinse thoroughly. To prevent activated carbon dust from falling into the can water fountain, ensuring the best filtration. It is recommended to replace the filter every 2-4 weeks. Package Included - 10 pack cat water filters & 10 pre-filter sponges & 10 pump filter sponges, worry-free 12 month warranty. If you have any questions about the filter, please let us know and we will reply within 24 hours. pet water fountain Filter