"Ensure your cat always has access to clean, fresh water with this replacement filter and pre-filter sponge set designed for cat water fountains. The filters are crafted with cotton layers, activated carbon, and ion exchange resin, providing gentle filtration that helps remove hair, debris, and impurities. Pre-filter sponges around the pump enhance the efficiency and prolong the service life of your fountain. This 12-pack provides long-term convenience, ensuring that your cat water fountain stays in optimal condition without frequent repurchases. Each multi-pack includes replacement filters and pre-filter sponges (12 of each). Regular replacement supports your pet’s water intake, improving taste and encouraging healthy hydration habits. Compact, space-efficient design , suitable for indoor use and multi-cat households. By maintaining clean water circulation, they help reduce debris accumulation, contributing to a cleaner drinking environment for your feline friends. "