Description: 【Double-Box Design】: This breeding box features a 2-box separation system, allowing for both breeding and isolation. It can be used to separate the mother fish after giving birth, providing a secure space for recovery and avoiding illness from being chased by male fish 【Enhanced Isolation Capabilities】: Suitable for isolating mother fish, sick fish, or fry. It allows for individual care and feeding, ensuring each fish receives the attention it needs without interference from others 【Anti-Jump Out Lid】: The upgraded lid ensures that no fish can jump out of the tank, providing peace of mind that your aquatic pets are secure within their environment 【Advanced Protection Panels】: The upper layer features a honeycomb hole plate with 3.8mm holes and a 3mm opening to reduce the chance of fry swimming back into risky zones, increasing their survival rate. The lower layer has fine mesh panels with 0.7mm holes to enhance water permeability while avoiding external fish from feeding on the fry 【Quality Construction】: Made from quality PS material, this breeding box is designed to withstand regular use in an aquarium setting Specification: Material: PS Size Chart: Inner compartment: 9.5cmx9.5cmx9.5cm/3.74inchx3.74inchx3.74inch Outer compartment: 9.5cmx9.5cmx13cm/3.74inchx3.74inchx5.12inch Overall Size: 12cmx12cmx13cm/4.72inchx4.72inchx5.12inch Package Includes: 1 Fish Breeding Box Set Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.