Music Folder: Used to store music notes, documents, etc., music folders, keys, A4-size paper with 30 compartments. Material: The inner pockets are non-slip and transparent with high-quality polypropylene (PP). The spiral binding allows the folder to be opened 180 degrees for flat music notes. Waterproof and thick pockets: The inner pockets are non-slip and transparent, and the concave-convex technology can reduce the reflected light to ensure that your key does not get wet while practicing. Perfect for: Suitable for daily filing and saving documents in A4 and smaller sizes, widely used in offices, schools and homes. Works equally well on piano, organ or performance synthesizer. Easy to use: choir and piano notes and other papers can be inserted. A standard display book that can be easily inserted and removed from the music notes or music files. Product Description Music Stand, Multifunctional Sheet of Paper Document File Music Stand Organizer Folder Features: 1. Material - High-quality polypropylene (PP) material that is lightweight, durable, waterproof and able to protect documents for a long time. 2. The spiral binding allows the folder to open 180 degrees for flat sheet music. The folder will not automatically close on a music stand. This allows for easy and accurate turning of the pages. 3. Can be used to store documents, music notes, 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 reflected light, making your sheet music or document files safer. 5. Standard display book - The clear bands are sealed on the outer edge. Even if the folder is upside down, your grades will not fall out. 6. A good 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) Color: black Size: A4 / 31.5cm x 24cm Bags: 30 bags Package: 1 pc Music Stand / Concert Choir Folder