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 not scratch your hands, the inner pages are stable, and the score not fall easily. The sheet music folder is suitable for any instrument and any occasion, and is a 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) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.