<p><strong>Applicable water fountain:</strong> This cat water fountain filter is suitable for 67oz/2L square cat water dispenser and 84oz/2.5L stainless steel cat water dispenser (shown in the picture).</p> <p><strong>Health and Safety:</strong> Made of eco-friendly and non-toxic materials, the filters help ensure the water quality and provide healthy and pure water to protect your pet's health.</p> <p><strong>Suggestions for use:</strong> To keep the drinking water fresh and hygienic, it is recommended to replace the pet water fountain filters every 2-4 weeks, depending on the number of cats in your home. Before using the pet fountain filter replacement, rinse them thoroughly under running water and then install them in the cat fountain.</p> <p><strong>Four layer circulating filtration system:</strong> This cat water fountain filter replacement contains activated carbon and ion exchange resin, which together with the non-woven fabric form a four layer circulating filtration system. This effectively filters pet hair, food residue, absorbs odors, and softens the water, providing your pet with fresh, healthy drinking water.</p> <p><strong>Reliable material :</strong> This filters for cat water fountain is made of BPA-free material, which will not affect your pet's health.</p>