A4 Size Mushroom-shaped Button Music Sheet Binder Folder with Index Tabs, Black 20 Pages, Black 30 Pages, Black 40 Pages, Black 40 Pages+Pen+Notebook, Simple Black 40 Pages+Pen+Notebook, Simple Black 40 Pages, Simple Black 30 Pages+Pen+Notebook+Clip...

1. Strong Clamp, Secure Sheet Holding: Built-in high-strength metal clamp firmly holds sheet music in place, preventing pages from slipping or flying away during practice or performance.
2. Slim & Lightweight Design: Ultra-slim profile with lightweight construction makes it easy to carry in backpacks or instrument cases without adding bulk.
3. Smooth Surface, Elegant Look: Minimalist finish with clean edges delivers a modern, professional appearance suitable for students, teachers, and performers.
4. Easy Page Turning & Quick Access: Open-clip design allows fast insertion and removal of sheet music, ensuring smooth page turning while playing.
5. Wide Application for Musicians: Ideal for piano, violin, drum kit guitar, flute, vocal practice, rehearsals, music classes, and daily training sessions.
6. Cover dimensions: 240 x 318 mm
7. Inner page dimensions: 235 x 314 mm