Comprehensive Package: Each set includes high-quality cat fountain filters paired with sponge filters, ensuring you have ample replacements to maintain your pet's water fountain. Preparation and Maintenance Tips: To achieve the best results, soak the filter for 5 minutes and rinse thoroughly for before installation. For optimal performance, replace the filter every 2-4 weeks depending on the number of pets and their drinking frequency. Regular Replacement: To maintain the filtration effect, it is recommended to replace the filter every 2-4 weeks. If you have multiple pets, please consider shortening your replacement cycle Warm Tips: Please immerse the filter in water for 2 minutes and rinse thoroughly before use to achieve the best filtration effect and your pet enjoys clean and fresh water Promotes Hydration and Health: Regular use of our filtered water fountain encourages pets to drink , which is crucial for their health and helps prevent urinary tract infections and other hydration-related issues. Improved Taste: filters reduce the taste and odor of chlorine found in tap water, which can make the water more appealing to cats. Colour: As Shown Material: Non-Woven Fabrics Package Contents: 9 x Cat Water Fountain Filters 9 x Sponges Foam Filters Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.