Feature: 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. Specification: Item Type: Sheet Music Folder Material: PP Inner Pages: A4 Paper Specification: Default 52 Sheets (Inner Pages Can Be Increased by Yourself) Expandable Pages: 4 Pages. Package List: 1 x Sheet Music Folder12 x Inner Pages