Pet Water Fountain Replacement Filters Multiple Filtration Cat Drinking Fountain Filters With Pre-Filter Sponges 1. Material: ABS grid, non-woven fabric, carbon bag, resin 2. Preferred natural filtration ingredients, multiple cartridge filtration system, pet water dispenser replacement cartridge, individually packaged and sealed to maintain high quality 3. The filter adopts plastic as the bottom shell and consists of cotton layer, activated carbon and ion exchange resin, they can filter hair, heavy metals and improve the taste of the water, so that your pet can drink clean and healthy water 4. Suggestion: to prevent the activated carbon dust (which will not harm your pet) from falling into the water, please soak the filter in water for 2 minutes, and then rinse it thoroughly with running water before using it again 5. Replacement: each time you change the water in the fountain, please rinse the filter with running water and replace the filter every 2-4 weeks depending on the frequency of your pet drinking and the number of pets using the fountain 6. Compatibility: the filter can be matched with a variety of cat fountains, applicable fountain styles have been listed in the product image, before purchasing, please confirm whether it matches with your cat fountain, so as to avoid buying the wrong one 7. Size: the filter cartridge about 10 x 10.5 x 1.9cmpc Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin