PET STANDARD Water Filters. Compatible with Kastty® 101oz/3L Fountain. Pack of 12

[Compatibility] PET STANDARD Replacement Filter Compatible with Kastty® 101oz/3L Water Fountain. These are PET STANDARD branded filters and are not created or sold by Kastty.[Premium 12 Pack Pet Fountain Filters] Pack of 12 Filters + 12 Pre-Filter Sponges[Compatible Pet Filter] Filter Measurments: Outside Diameter 5 inch. Thickness is about 0.4 inch. Pre-Filter: 2 x 1 x 0.5[Premium Quality Filters] Double Filtration System: Composed of a cotton layer and activated carbon. Effectively to filter hair . 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.[Friendly Customer Service] Please feel free to contact us if you have any questions about our products . we'd like to help you!