Specification: Item Type: Fish Isolation Box Material: Acrylic Hole Size of Isolation Box: Approx. 1.5mm/0.06in Diameter of Suction Cup: Approx. 4cm/1.6in Package List: 6 x Acrylic Partition 8 x Rubber Circle 1 x Sucker Note: 1. There might be a slight error of 0.1‑0.5cm due to manual measurement.2. Please remove the protective film on both sides before use.3. It is disassembled into flat plates for shipment, and you need to assemble it by yourself after receiving the goods.