PERFECT MATCH: ONLY compatible with 67oz/2L uahpet Cat Water Fountain. PREMIUM 6 PACK: Package includes 6 premium pet fountain replacement filters and 6 replacement filter sponges. They are individually packaged and sealed to maintain high quality. FRESH, FILTERED WATER: Each filter is composed of eco-friendly shell, KDF, ion exchange resin, quartz sand, coconut activated charcoal, and cotton. They help filter pet hair, heavy metals, and improve water taste, providing clean and fresh water for pets throughout the day. This may help increase water consumption and support urinary tract health. RECOMMENDATIONS: To minimize coconut activated charcoal dust (which is not harmful to pets) from entering the water, soak the filter and sponge in water for 15–20 minutes and rinse thoroughly under running water before first use. EASY TO REPLACE: Designed for easy removal during cleaning. Depending on your pet's drinking habits and the number of pets using the fountain, replace the filter and sponge every 3–4 weeks to maintain optimal fountain performance. Our products are made with high-quality materials and designed to deliver a reliable and satisfying user experience.