It's made longer to prevent horn bending. How about using it to prevent horn bending in large rhinoceros beetles? It's just the right size to fit perfectly in a Daiso shoe storage case (a case that others use to house pupal chambers). If it doesn't fit in the case, you may need to make minor adjustments. *Please note that since I purchased these individually without packaging, there may be dents or scratches from before production. Please refrain from purchasing if you are sensitive to these imperfections. *This item is also listed on other sites, so it will be sold on a first-come, first-served basis. Thank you for your understanding.