Features: Easy Use: Detachable box, easy to disassemble and clean. External separating hatchery for pregnant fish, protecting new born fish from being attacked, improving the survival rate of newborns fish. Creates a safe and secure breeding box for small fish while monitors your baby fish easily. Space-Saving: external box, easycombination, saving space. Isolation Box: Unique clear panel, preventing fish jumping out. Can be used as the spawning box for the viviparous fishes. Especially great for aggressive fish or injured fish. Specifications: Component: Plastic Size S: Approx.16.2x11x12cm/6.38x4.33x4.72inch Size L: Approx. 25.5x13x13.5cm/10.04x5.12x5.31inch Quantity: 1 Pc Package Includes: 1 Set Aquarium Breeding Box note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind before you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color