Size (approx.) Width 9.5 x Depth 12.5 x Height 12 cm Water capacity (approx.): 0.7L Applicable tank: Aquariums with frames less than 26mm in frame width, frameless aquariums with glass thickness of 5mm or more It cannot be attached to parts where the straight line is less than 10 cm or to aquariums with a height of 15 cm or less. It also cannot be attached to unstable aquariums or plastic cases. This product is a hang-on breeding box (a type that attaches to the outside of the main aquarium). As the main tank's breeding water is lifted up with the air discharged from the air pump and circulates within the box, it is automatically returned to the main tank while constantly supplying breeding water rich in oxygen. Also, since the water temperature and water quality inside the box are basically the same as the main aquarium, there is no need to install heating equipment or filters inside the box. The fry that are laid can escape from being eaten by the parent fish by taking refuge below through the slits of the separator. It can be used for breeding boxes for ovoviviparous fish such as guppies and platies, treatment spaces for small marine fish and corals, acclimation boxes, breeding boxes/isolation boxes for various fry and juveniles, and for keeping bettas, medaka, and bee shrimp. Caution This product is used by hanging it on the outside of the main aquarium. It cannot be used alone. This product requires a separate air pump (output: recommended 1L/min or less) and air tube. There may be some fine white linear "streaks" on the surface of this product. These lines are generated during the manufacturing process and may cause differences in appearance, but they do not affect the strength or functionality of the product and are not a problem under normal use conditions. Please consider before buying, if you are particular about product condition. Please purchase with understanding in advance.