The fish breeding case is easy to use and maintain, making it an excellent choice for both novice and experienced fish keepers. Simply place the box in your aquarium, and it will float on the water's surface. The transparent material allows for easy observation of the fish, ensuring that you can monitor their and health at all times. Features -Color:Transparent -Material:Plastic and nylon -Size:12.60X7.00X7.00cm/4.95X2.75X2.75in -Optimized hatching: dual-layer design facilitates the hatching of multiple fish batches at the same time, improving efficiency -Fry protection: self-floating design prevents fry from being eaten by other fish, boosting their survival rate -Versatile breeding: suitable for breeding bettas, fry, and other fish species, fulfilling different breeding needs -Clear observation: transparent material allows for easy monitoring of fry growth and timely adjustments to the environment -Space-saving design: compact structure takes up minimal space, proper for home aquariums and breeding facilities Package list: 4 x fry boxes