<p><strong>Compatibility:</strong>The replacement filter and pump filter set fits perfectly with 67oz/2L gray, orange, green, blue and clear automatic cat drinking fountains.</p> <p><strong>Quadruple Filtration System:</strong>The cat drinking fountain filter has a 4-layer filtration system. Friendly pp shell, blocks hair and large particles, high-density cotton can filter hair and residue to keep the water clean; activated carbon can remove chlorine and odor, purify water quality and refresh water; ion exchange resin can filter heavy metals and improve taste, which can encourage pets to drink more water and reduce the risk of urinary tract infection.</p> <p><strong>Pre-filter Pump Sponge:</strong>High-density pet fountain pump filter, which can capture hair and debris to prevent them from entering the water pump, can more effectively protect the water pump and extend the service life of the fountain.</p> <p><strong>Regular Replacement:</strong>In order to achieve better filtering effect, we recommend replacing the filter and sponge every 2 to 4 weeks, if you have multiple pets, please replace more frequently. </p> <p><strong>Warm Tips:</strong> Before replacing the filter element, please soak the filter element in water for 2 minutes and then rinse the filter element thoroughly, which can prevent carbon dust from falling into the water and keep the water clean and fresh.</p> <p>Specifications:</p> <ul> <li>Material: Cotton, Charcoal</li> <li>Package Contents: 4*Filters+4*Sponge</li> <li>Weight: 0.13kg</li> </ul>