General description The 24PCS Cat Water Fountain Filters set includes 12 pieces of carbon filters and 12 pieces of foam sponges, designed to keep your pet's drinking water clean and fresh. These filters effectively remove food scraps, hair, and other debris, ensuring a healthy hydration source for your cats. Technical specifications 12 pieces of carbon filters 12 pieces of foam sponges Usage Cat water fountain filters should be replaced every 2-4 weeks, depending on usage frequency. Regularly changing the water and keeping the fountain clean is essential for maintaining your pet's health.