These pet fountain filter replacement cartridges are compatible with Tossca pet fountains. They are easy to replace and help keep your pet's water fresh and clean. The filters are made from high-quality materials and are designed to remove impurities and debris from your pet's water, ensuring that they stay healthy and hydrated. The replacement cartridges are easy to install and remove, and they come in a pack of six, so you can keep a spare on hand for when it's time to replace them. These filters are a great way to keep your pet's fountain running smoothly and to ensure that they have access to clean, fresh water at all times.