Check the listing for details. PET STANDARD Water Filters Compatible with VEKEN® 95oz/2.8L Fountain, Pack of 12. Condition: New. Listed at 16.99 USD. PET STANDARD Replacement Water Filter & 12 Pack Replacement Pre-Filter Sponges Compatible With VEKEN® 95oz/2.8L Automatic Pet Fountain, Pack of 12 [Compatibility] ONLY Compatible with VEKEN® 95oz/2.8L Pet Water Fountain. If any doubt, please check product dimensions.[Compatible Pet Filter] Length is about 4 inch. Width is about 4 inch. Thickness is about 0.5 inch. The pre-Filter Sponge: Length: 1.5 inch. Width: 1.1 inch. Height: 1 inch.[Premium Quality Filters] Triple Filtration System: Composed of a cotton layer, activated carbon and an ion exchange resin. Effectively to filter hair, heavy metals, keeps water fresh and improve the taste of the water.[Frequency Of Replacement] To prevent the activated carbon dust from shedding into water, please soak the cat fountain filter in water for 2 minutes then rinse thoroughly under running water before using. 1 to 2 weeks in summer and 2 to 4 weeks in winter. If multiple cats are using the fountain, more frequent replacement will be necessary.[Premium 12 Pack Pet Fountain Filters] 12-pack of premium pet fountain replacement filters and 12 Pack of pre-filter sponges individually packaged and sealed to maintain high quality. Enough supply for 3 to 12 months of use. Replace the pre-filter sponge every 4-6 weeks.[Friendly Customer Service] Please feel free to contact us if you have any questions about our products, we'd like to help you!