The Premier Pet Fountain Replacement Carbon Filter 3 Pack includes four filters each, totaling twelve filters for your cat's fountain. Made with foam and carbon materials, these white filters are designed to keep your pet's water clean and fresh. Compatible with the Premier Pet Fountain model, these units are essential for maintaining your pet's hydration needs. The filter pack ensures that you have an ample supply of filters to keep your cat's water free from debris and contaminants.