Keep your cat’s drinking water clean and fresh with the Catit Premium Dual Action Filter for the Fresh & Clear Stainless Steel Top Drinking Fountain. The dual-action design combines foam to help collect large particles and debris with activated carbon that helps reduce odors and absorb impurities. Made specifically for the Catit Fresh & Clear Stainless Steel Top Drinking Fountain for Cats (Item 118644) to ensure a reliable fit. Ideal for everyday cat water fountain maintenance, each pack includes two replaceable filters.