Sheet Music Folder: Used for storing sheet music, documents, etc., sheet music folders, sheet music, 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 open at a 180-degree angle for flat sheet music. Waterproof and thick pockets: The inner pockets are non-slip and transparent, and the concave-convex technology can reduce reflected light to ensure your sheet music does not get wet during practice. Perfect for: Suitable for daily filing and saving A4 size and smaller than A4 documents, widely used in offices, schools, and homes. Works equally well on piano, organ, or performance synthesis. Easy to use: choir and piano sheet music and other papers can be inserted. A standard display book that can be easily inserted and removed from sheet music or music files. Product Description Music Holder, versatile paper document folder Music Holder Organizer Folder Features: 1. Material - High-quality polypropylene (PP) material that is lightweight, durable, waterproof, and can protect documents for a long time. 2. The spiral binding allows the folder to open at a 180-degree angle for flat sheet music. The folder does not automatically close on a music stand. This allows for easy and correct 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 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 scores will not fall out. 6. An excellent 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 piece Music Holder / Concert Choir Folder