- High Performance: Our aquarium cartridges feature strong adsorption properties, effectively removing debris and keeping your aquarium water clean and clear. - Premium Material: Constructed from high-quality PVC pp material, these cartridges are designed for durability and long-lasting performance, ensuring you get the most out of your investment. - Wide Compatibility: These internal cartridges are ideal for various setups, including 5W low water systems, fish tanks, reptile tanks, and turtle tanks, making them versatile for different aquatic environments. - Package Details: Each package contains 4 replacement cartridges, with dimensions of approximately 14.2cm x 7.2cm x 0.9cm (5.59 inches x 2.83 inches x 0.35 inches). Please note that the machine is not included. Use Cases: 1. Perfect for maintaining a clean environment in small fish tanks, helping to keep your aquatic pets healthy and happy. 2. An excellent choice for reptile and turtle tanks, ensuring optimal water quality for your reptiles. 3. Ideal for low water setups, providing reliable filtration performance without taking up much space.