Perfect Fit: Compatible exclusively with 67oz/2L Uahpet Cat Water Fountain. Premium 6-Pack: Includes 6 high-quality replacement filters and 12 filter sponges, individually sealed for freshness and long-lasting performance. Fresh, Clean Water: Filters made from Eco-Friendly Shell, KDF, Ion Exchange Resin, Quartz Sand, Coconut Activated Charcoal, and Cotton. Effectively remove hair, heavy metals, and odors, improving water taste and encouraging hydration. Helps reduce the risk of urinary tract infections. Easy Setup: To avoid activated charcoal dust (harmless to pets), soak filters and sponges in water for 15-20 minutes and rinse before use. Convenient & Regular Maintenance: Replace filters and sponges every 3-4 weeks based on pet usage for optimal fountain performance and cleaner water.