1. Package Included: The kit includes 10 carbon filters and 10 foam plugs, allowing for 10 refills. The ample quantity ensures it meets your usage and replacement needs, providing your pets with clean drinking water. 2. Triple Filtration System: The performance cleaning filter consists of a cotton layer, activated carbon, and ionexchange resin. It effectively filters impurities, pet hair, sediment, and dirt while softening tap water—crucial for your furry friend's kidney health. 3. Quality Material: Each cat fountain filter is made of activated carbon, ionexchange resin, and nonwoven fabric to eliminate bad tastes and odors, keeping the water fresh. 4. Easy to Install: The replacement filters are compatible with wireless cat water fountains. It takes just about 5 seconds to remove the old filter and it with a one. The filter easily fits over the water tank and can be removed effortlessly for cleaning.