1. Scalable and high capacity - The file manager keeps the files from each slot separate and organized in a good way. 2. Portable and secure design - Accordion folder's full-size flexible flap and umbilical cord closure provide additional security. To access stored items, simply fold the flap. When done, return the flap up and on top of the folder and make sure it is in place using the umbilical cord closed. 3. Stable waterproof material - Our letter accordion folders are made of high-quality polypropylene (PP) plastic material, environmentally friendly and not easy to break or deform. Waterproof and moisture-proof material to keep your important documents clean. 4. Widely used - Our extended document organizers are utility bills, invoices, letters, A4 paper and other documents. Suitable for school, office, home use, can also be used as teachers, students, doctors, engineers, designers, researchers, sales staff and other good gifts 5. Versatile - Accordion folders provide a great way to sort your important documents, photos, monthly receipts, tax paperwork, etc. Suitable for family, school, office, business travel. It's also a great car storage accessory for keeping your temporary files in place. Four different patternssize: 32.5* 24.5cmMaterial:plastic