Feature: 1. Excellent PP Material: This sheet music binder is made of high-quality PP material, which is durable, waterproof, tear-resistant, and resistant to warping. It helps you easily organize and protect important sheet music or other paper documents. 2. Dual Spring Design: This sheet music holder features a dual spring mechanism that allows it to open 180 degrees and lay flat on a piano music stand, providing a comfortable viewing angle during performance. 3. Writable Surface: The sheet music folder covers only the top and bottom edges, leaving the page surface fully accessible. The non-reflective cover helps keep sheet music clear and reduces eye strain, allowing direct writing or annotation on the pages. 4. 60-Page Capacity: This music sheet file folder can hold up to 60 sheets, making it ideal for storing sheet music, drawings, and other documents. Designed for standard A4 size paper. 5. Wide Application: Suitable for use in bands, orchestras, school choirs, and other musical settings, this folder offers practical storage for performers and educators. Specification: Item Type: Sheet Music Folder Material: PP Inside Page Size: A4 Functions: Changeable Sheet Music, Non-Glare, Two-Page Continuous Expansion Package List: 1 x Sheet Music Folder