PERFECT MATCH: Only compatible with uahpet 67oz/2L cat water fountain. Premium 6-Pack: Pack includes 6 pack of replacement pet fountain filters and 1 pack 6 filter sponges spare. They are individually wrapped and sealed to maintain high quality. FRESH & FILTERED WATER: Each filter is made of eco-friendly shell, KDF, ion exchange resin, quartz sand, activated coconut shell carbon and cotton. They can filter hair, heavy metals and improve the taste of the water so that the animals can drink. clean, fresh water all day, which helps to increase water intake and reduce the risk of UTIs. RECOMMENDATIONS: To prevent coconut shell activated carbon dust (which will not harm your pets) from spilling into the water, please soak the filter and sponge in water for 15 20 minutes and rinse them thoroughly under running water before use. EASY TO REPLACE: Easily removed when cleaning your pet’s fountain. Depending on your pet’s drinking frequency and the number of pets using the fountain, please