Welcome to the store! Exquisite workmanship, transparent and compact. The unique floating design can be installed on the left or right side, it will not sink, double combination, does not take up space. With black background sticker, it is better to watch the landscaping. Replace the traditional water filling device. Easy to install, just follow the instructions. Specifications: Material: Plastic Size: Approx. 12x13x19cm/4.72x5.12x7.48inch Suitable thickness of aquarium wall: 4-19mm/0.16-0.75inch Note: 1. Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2. Due to the differences between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Fish Breeding Box Your satisfaction is our highest priority. We will provide you with the best service. If you find any problems after receiving the product, such as damage, incorrect quantity, etc., please contact us immediately and we will provide you with the best solution!