Features 30 pockets / 60 pagesInner bag is made of high quality polypropylene (PP)Waterproof and dustproofEasy operationMultifunctional music binderMusic holder , Versatile Paper Sheet Document File Music Holder Organizer -Folder Functions: 1. Material - High quality polypropylene (PP) material, lightweight and durable, waterproof, able to protect documents for a long time. 2. The spiral binding allows the binder to open at a 180 degree angle for flat sheet music. The folder does not close automatically on a desk. This allows for easy and accurate page turning. 3. Can be used to store documents, sheet music, picture sketches, etc. Suitable for daily document filing and storage; A4 size and smaller than A4. 4. The inner plastic pockets are thick and transparent, and the concave-convex technology can reduce reflected light, make your music score or document files safer. 5. Standard Display Book - Translucent bands are sealed around the outer edge. Even if the folder is upside down, your partition will not fall. 6. A great assistant for instrumentalists, musicians, students, office workers, etc. Design for office, school and home. Sheet clearly visible without light reflection. Specification: Material: High quality Polypropylene (PP) Color: black Size: A4 / 31.5cm x 24cm Bags: 30 bags Package: 1 piece Concert Choral Record/Music Case