Unused item. It has only been opened once. I purchased it as a spare, but due to the transition to an external filter, I have no plans to use it in the future, so I am selling it. Kotobuki Super Turbo Triple Box 450 45cm aquarium filtration filter (Equipped with 3 filtration chambers and 3 types of filter media) Manufacturer... KOTOBUKI Product Name... SUPER TURBO 3BOX450 Top filter for ornamental fish Includes 3 types of filter media