Music Folder: Holds music files, music folders, music files, music files, A4 paper with 30 pockets. Material: Inner pockets are non-slip and transparent with high-quality polypropylene (PP). With the spiral binding, you can open the folder to a 180-degree angle for flat sheet music. WATERPROOF AND THICK POCKETS: Inner pockets are non-slip and transparent, and the concave-convex technology can reduce reflected light to ensure your sheet music doesn't get wet during practice. PERFECT FOR: Suitable for daily storage and organization of A4 documents and documents smaller than A4, commonly used in offices, schools, and households. Works equally well on piano, organ, or synthesizer. Easy to Use: Sheet music and other papers can be inserted. A standard display book that can easily insert and remove sheet music or files. Product Description Music Holder, Multifunctional Paper Sheet Document File, Music Holder, Organizer. Features: 1. MATERIAL - High-quality polypropylene (PP) material that is lightweight and durable, waterproof, and can protect documents long-term. 2. The spiral binding allows you to open the folder to 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, notes, sketches, etc. Suitable for daily filing and storage of documents, A4 size and smaller than A4 size. 4. The inner plastic pockets are thick and transparent, and the concave-convex technology can reduce reflected light, making your music or document files safer. 5. Standard Display Book - The transparent bands are sealed on the outer edge. Even if the folder is upside down, your notes will not fall out. 6. A good assistant for instrument players, musicians, students, office workers, etc. Designed for office, school, and home. Sheet music 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 Choir Folder.