The sheet music folder adopts metal double-ring spiral binding, the opening position is accurate, not easy to loosen, and the sheet music can be easily tiled to 180 degree. The sheet music folder has a 4-sided PP hard cover, even if the music shelf does not support outer pages, it can support the sheet music well without falling down. The corners of the sheet music are designed in a semicircle, which will not scratch your hands, the inner pages are stable, and the score will not fall easily. The sheet music folder is suitable for any instrument and any occasion, and is a perfect gift for instrument players. Sheet music folder is a multifunctional file folder organizer,that can store documents, papers, files, not just music scores. Color:Black Material:plastic Package Contents: 1 * Expand Music Folder(Only the music folder has no A4 paper)