1.1 black 13-pocket expansion folder to store letters, A4 paper, documents, invoices, contracts and plain paper. File folders are easy to carry and can be placed in backpacks, briefcases, suitcases, etc 2. Durable and waterproof - These file organizer expansion folders are made of high quality PP, strong and flexible, tear resistant and super durable. Waterproof and moisture-proof material to keep your important documents clean. 3. Expandable pockets with tabs - The file jacket has 13 expandable personal pockets to keep different files neatly sorted into sections, so you can tag each file and easily find it, helping you keep everything organized without any clutter. 4. Secure design - Our folder manager has an elastic rope that closes the flap to protect the documents securely during transportation, allowing you to carry your documents wherever you go. 5. Widely used - Our accordion folders are for organizing 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 gifts. Color:blacksize:33*24*4cmMaterial:plastic