Note folder: Used to store notes, documents, etc., note folders, clefs, paper in A4 format with 30 compartments. Material: The inside pockets are non-slip and transparent with high quality polypropylene (PP). The spiral binding allows the folder to be opened 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 the reflected light to ensure your clef doesn't get wet while you practice. Perfect for: Suitable for daily filing and saving of A4 size and less than A4 documents, widely used in office, school and home. Works equally on piano, organ or performance synthesizer. 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 the sheet music or music files. Product Music Holder, Multipurpose Sheet Of Paper Document File Music Holder Organizer Folder Features: 1. Material - High quality polypropylene (PP) material that is light, durable, waterproof and able to protect documents over the long term. 2. The spiral binding allows the folder to be opened at a 180 degree angle for flat sheet music. The folder does not automatically close on a music stand. This enables easy and accurate turning of the pages. 3. Can be used to keep documents, music notes, picture sketches, etc. Suitable for the 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 the reflected light, make your music score 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 great assistant for instrument players, musicians, students, office workers, etc. Design for office, school and home. Leaf clearly visible without light reflection. Specification: Material: high quality polypropylene (PP) Color: black Size: A4 / 31.5 cm x 24 cm Bags: 30 bags Package: 1 piece Music Holder / Concert Choral Folder