Description: 2 Size AvaiableS:10cmx5cmx18cm; M: 19cmx5cmx18cm; Small and compact fish breeding box is lightweight, can be easily hang on the aquarium fish tank. FeaturesSmall acrylic hatchery incubator case with hanging design, and adjust height range 9cm/3.54inch; Suitable for 3-18mm thickness; Effectively prevent young fish from being attacked by adult fish and improve the survival rate of small fish. Hatchery Isolation CaseMultifunctional hatching box perfect for isolating and protecting small fishes, pregnant fishes and newborn fishes. Aquarium Divider BoxFish Isolation Case suitable for guppy baby fish, shrimps, medaka, bettas, guppies, ect. A must-have accessory separating hatchery incubator for your fish tank. High Quality MaterialFish tank incubator box is made of transparent acrylic, high light transmission allows you can clearly observe the baby fishes condition inside the box. Safe, durable and easy to clean. Specification: Material: Acrylic Size Chart: S: 10cmx5cmx18cm/3.94inchx1.97inchx7.09inch M: 19cmx5cmx18cm/7.48inchx1.97inchx7.09inch Package Includes: 1 Piece Fish Isolation Box Note: Please allow slightly errors due to manual measurement and different monitors.