1. Material: plastic 2. The overall edge is anti-collision, not easy to damage and more firm 3. The handle has a snap button, and the falling materials are not easy to be scattered. 4. 12 layers of large capacity, can hold about 150-200 test papers, can hold 300 sheets of A4 paper 5. There is an index label design on the inner page, and the data is stored in categories 6. Waterproof and dirt-resistant, hard case cover to protect built-in data 7. The size is moderate, can be put into a school bag, easy to store, easy to take documents 8. Size: 24.5x37.5cm 9. Weight: about 220 grams
