Keep your aquarium clean with these Top Fin Small Element Filter Cartridges EF-S. This 2- packs  include 9 filters total, which are perfect for tanks with a capacity of 3 gallons or less. These cartridges are designed for use with fresh water and have been made in China. They are suitable for Top Fin models and are easy to install. Whether you're a seasoned fish owner or just starting out, these cartridges are essential for maintaining a healthy and clean aquarium. With its high-quality design, they are sure to provide reliable performance and long-lasting durability. Order now and give your fish the clean environment they deserve.