This is a 4.5 kg set of insect pellets. Made from 100% coniferous trees, we use it at home for all domestic and foreign stag beetles and adult rhinoceros beetles. It's also used in familiar insect shops and is recommended for large species like the Japanese giant stag beetle and Hercules beetles. As you use it, it breaks down into a fine mat-like texture, and it expands many times its size when water is added, making it easier to store and more economical than regular mats. It's recommended because it has excellent anti-mite and deodorizing effects.