Features: brand new and high quality Safety Material: Made of high-quality acrylic, high transparency, non toxic, safe for fish. Aquarium Breeder Tank: A must-have small separating hatchery for pregnant betta or guppies, protecting new born fry from being eaten or attacked, improving the survival rate of newborn fish. Isolation Box: Unique removable clear cover design with feeding holes, preventing fish jumping out of the box. Can be used as the spawning box for the viviparous fishes. Especially great for aggressive fish or injured fish. Easy to Use: Simple to assemble. Floating design, no worry about dropping off. Wide Application: Suitable for all kinds of aquariums, tropical and marine fish. Specifications: Material: Acrylic Color: Transparent Style: Acrylic Bottom/Gauze Bottom Size (Approx.): Acrylic Bottom Permeable Hole Diameter 2mm/0.08in Gauze Bottom 100 Mesh S-12x10cm/4.72x3.94in L-15x12cm/5.91x4.72in Weight (Approx.): Acrylic Bottom S-141g Acrylic Bottom L-223g Gauze Bottom S-140g Gauze Bottom L-196g Package Includes: 1 Piece Aquarium Breeder for Tank (Acrylic Bottom/Gauze Bottom, S/L) note: 1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!