Features: Experience clear fish observation with our Fish Viewing Box, use selected acrylic for a superior viewing experience and easy maintenances. This fish breeding box with optional size, making it practical and convenient for small fish breeding and viewing. Great for both professional aquarists and hobbyists, this multiuse box is great for anyone interested in fish breeding, photography, or research. Use it as a hatching incubator, or isolation box in various occasion like outdoor fieldwork, laboratory studies, or home aquarium. The multifunctional designs also serves as a viewing box for other small creature such as snails, and geckos, enhancing your exploration and observation activity. Specifications: Product Dimension: Approx. 01 size 11x2.50x5.1cm/4.33x0.98x2inch, 02 size 16x4x5.3cm/6.3x1.57x2.09inch, 03 size 22x4.2x8cm/8.66x1.65x3.15inch, 04 size 25x4.4x9cm/9.84x1.73x3.54inch Component: Acrylic Type: 01/02/03/04 Package Includes: 1PC Fish Breeding Box note: Please allow 0-1cm error due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color the item.