Check the listing for details. Water Filters & Sponges For ORSDA® Stainless Steel Pet Water Fountains, 12 Pack. Condition: New. Listed at 16.99 USD. PET STANDARD Replacement Water Filter & 6 Pack Replacement Pre-Filter Sponges Compatible With ORSDA® 67oz/2L Stainless Steel Pet Water Fountains, Pack of 12 [Compatibility] ONLY Compatible with ORSDA® / Wopet 67oz/2L Stainless Steel Pet Water Fountain. If any doubt, please check product dimensions.[Compatible Pet Filter] Length is about 3 inch. Shortest Width is about 1 inch. Longest Width is about 1.35 inch. Thickness is about 0.25 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. 3 days summer and 1 week 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 6 Pack of pre-filter sponges individually packaged and sealed to maintain high quality. Enough supply for 1 to 3 months of use. Replace the pre-filter sponge every 2-3 weeks.[Friendly Customer Service] Please feel free to contact us if you have any questions about our products, we'd like to help you!