crystal-zoo Crystal Acrylic Hamster Single Layer Pet Cage 1. Easy to install, easy to clean. 2. Air holes by design, LED fan (optional). 3. Dimensions: About 11.81 * 7.87 * 7.87 inch 4. The imported acrylic, safe non-toxic, lets in light as high as 92% and above. 5. Before installing, remove the protective film , install the product according to the instructions.