1、52 PAGES CAPACITY: Accommodating up to 52 pages of A4 sized sheet music, the sheet music folder is perfect for storing sheet music for your piano, keyboard, violin, cello, and guitar. 2、4 PAGE EXTENSION: The piano sheet music binder can be opened to present four pages simultaneously, avoiding any disruptions to your performance due to page turning. 3、THICKENED OUTER SHELL: Featuring a thick and soft frosted outer shell that is waterproof, this sheet music folder ensures long lasting usage. 4、LOOSE LEAF DESIGN: The sheet music binder features a detachable buckle design for a convenient and easy operation. This allows for easy installation and removal whenever required. 5、MULTI PURPOSE USE: Besides serving as a music folder, this binder can also be used for other document storage, making it suitable for teachers, students, office clerks, and more. 1 x Sheet Music Folder12 x Inner Pages Item Type: Sheet Music FolderMaterial: PPInner Pages: A4 PaperSpecification: Default 52 Sheets (Inner Pages Can Be Increased by Yourself)Expandable Pages: 4 Pages