MATCH Uahpet Stainless Steel Fountain (basic version) : ONLY Compatible with uahpet basic version Stainless Steel Cat Water Fountain 67oz/2L (i.e. No Water Level Window Version uahpet Stainless Steel Pet Fountain). Premium 6 Pack: Package includes 6-pack of premium pet fountain replacement filters and 8-pack replacement filter sponges. Keep Water Clean: Each filter is composed of Shell, KDF, Ion Exchange Resin, Quartz Sand, Coconut Activated Charcoal and Cotton. Use Method: To prevent the coconut activated charcoal dust (which will not harm your pets) from shedding into the water, please soak the filter and the sponge in water for 15-20 minutes and rinse it thoroughly under running water before use. Easy to Install: Easily removes when you clean your pet’s fountain. According to your pet's drinking frequency and the number of pets using the fountain, please replace the filter and the sponge every 3-4 weeks to properly maintain your pet fountain. Please note that water fountain is not included in this set, only with replacement filters for uahpet stainless steel fountain. uahpet stainless steel cat fountain (basic version) 6 pack filters, (water fountain is not included)