Music Folder: Perfect for storing sheet music, documents, and more. This music folder features 30 pockets for A4 paper and keys. Material: Inner pockets are non-slip and transparent, made from high-quality polypropylene (PP). The spiral binding allows the folder to open 180 degrees for flat sheet music. Waterproof and Thick Pockets: The inner pockets are non-slip and transparent, utilizing concave-convex technology to reduce reflected light and keep your music safe and dry during practice. Ideal For: Suitable for daily filing and storage of A4 and smaller documents, commonly used in offices, schools, and homes. Works perfectly with pianos, organs, or performance synthesizers. Easy to Use: Sheet music and other papers can be easily inserted. A standard display book that allows for simple insertion and removal of sheet music or music files. Product Description: Music Stand, Multifunctional Sheet Document File Organizer Folder. Features: 1. Material: High-quality polypropylene (PP) material that is lightweight, durable, waterproof, and protects documents long-term. 2. Spiral Binding: Allows the folder to open 180 degrees for flat sheet music. The folder stays open on a music stand, facilitating easy and accurate page turns. 3. Versatile Storage: Can be used for documents, sheet music, sketches, etc. Suitable for daily filing and storage of A4 size and smaller documents. 4. Inner Pockets: Thick and transparent inner plastic pockets with concave-convex technology reduce reflected light, ensuring your sheet music or document files are secure. 5. Standard Display Book: Clear bands are sealed on the outer edge, preventing your music from falling out even if the folder is upside down. 6. Excellent Assistant: A great tool for instrumentalists, musicians, students, office workers, etc. Designed for office, school, and home use. Sheets are clearly visible without light reflection. Specification: Material: High-quality polypropylene (PP) Color: Black Size: A4 / 31.5 cm x 24 cm Pockets: 30 pockets