Music Folder: Holds music files, music folders, music files, music files, A4 paper with 30 compartments. Material: The inner pockets are non-slip and transparent with high quality polypropylene (PP). The spiral binding allows you to open the folder at a 180 degree angle for flat notes. WATERPROOF AND THICK POCKETS: The inner pockets are non-slip and transparent, and the concave convex technology can reduce reflected light to ensure that your treble clef does not get wet when practicing. PERFECT FOR: Suitable for daily storage and storage of A4 documents and less than A4 documents, widely used in office, school and household. Works equally 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 into the sheet music or files and removed from it. Product description Music holder, multi-purpose paper sheet document file, music holder, organizer folder. Features: 1. MATERIAL - High quality polypropylene (PP) material which is lightweight and durable, waterproof and able to protect documents in the long term. 2. The spiral binding allows you to open the folder at a 180 degree angle for flat notes. The folder is not automatically closed on a music stand. This allows for easy and accurate page turning. 3. Can be used to store documents, notes, picture sketches etc. Suitable for daily filing and storing documents, A4 size and smaller than A4 size 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 clear ribbons are sealed on the outer edge. Even if the folder is upside down, your notes 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). Color: black Size: A4 31.5 cm x 24 cm Pockets: 30 pockets. Package: 1 x music holder / concert choral folder.