Music Stand, Multipurpose Paper Sheet Document File Music Stand Organizer Folder Functions: 1. Material - High quality Polypropylene (PP) material, which is lightweight and durable, waterproof, capable of long-term protection of documents. 2. The spiral binding allows the binder to be opened at a 180 degree angle for flat sheet music. The folder does not automatically close on a music stand. This allows for easy and accurate page turning. 3. Can be used to store documents, sheet music, picture sketches, etc. Suitable for daily filing and storage of documents; A4 size and smaller than A4. 4. The inner plastic pockets are thick and transparent, and the concave-convex technology can reduce the reflected light, make your music score or document files safer. 5. Standard Display Book - The translucent bands are sealed around the outer edge. Even if the folder is turned upside down, your sheet music will not fall out. 6. A great assistant for instrument players, musicians, students, office workers, etc. Design for office, school and home. Sheet clearly visible without light reflection. Specification: Material: High quality polypropylene (PP) Colour: black Size: A4 / 31.5cm x 24cm Bags: 30 bags Package: 1 Piece Music Holder / Concert Choral Folder