Usage Tips:[Perfect Compatibility]These replacement filters & filter sponges are compatible with for 67oz/2L Automatic Pet Fountain. [Multi-Filtration System]The five-layer filtering system formed by Eco-friendly shell, Ion exchange resin, activated carbon, high density cotton, high density sponge, which can trap hair and debris, remove odors, heavy metals and odors from the water, and purify every drop of water for your pet. [Easy To Replace]: The filter and sponge of the pet water dispenser are easy to remove and easy to install. [Replace Regularly]Suggest replacing water filter and sponge every 3-4 weeks to properly maintain your fountain. Please change it more often if your have multiple pets. [Warm Tips]Before replacing the filter, please soak filter in clean water for 15-20 minutes, and then rinse filter thoroughly with running water, keep water clean and . Material: non-woven fabric colour: White Package Contents: 3 x Cat Fountain Filters 6 x sponge Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.