[Compatibility]: This replacement filters kit is compatible with Petlibro 2.5L/84oz cat water fountain PLWF005/PLWF115. Please note the size and shape of the filter carefully. [Material]: Made of non-woven fabric, activated carbon from coconut shells and ion exchange resin. Thoroughly remove hair, dirt and other impurities, and keep water tasting fresh and clean all the time. [Easy to use]: Soak the cat fountain filter thoroughly with water before use. Then insert the cat fountain filter into the water dispenser. [Packages Include]: 10 Packs of replacement filters and 10 packs of replacement pre-filter sponge. [Use Tips]: Soak the filter for 5 minutes and rinse for 30 seconds before use. To maintain the filtering effect, recommended to replace the fi.