heat and pressure , not easy to damage and deform. Multi-function file folder perfect for home office school daily use, such as keep school papers travel files documents homework organized and papers or music sheets organization Lightweight music folders designed in capacity separated by 20 file pockets protector, giving spaces for your things, making it perfect for work, business, office meeting, school, travel, storage, outdoor activities, and casual daily use Music sheets folder it was just what you needed to able to play sheet music without turning pages; Ring lay-flat design make you reading more easy and note-taking efficiency Center hollow-out design is convenience, there is no barrier between the diaphragm in the middle, you can feel free modify the contents of the inside environmental friendly, nontoxic and non-radioactive, not easy to break and deformation. Organizer file folder water resistant, anti-dirty and easy to clean, also looks more deluxe comfortable to carry. Tabs are staggered from left to right for perfect visibility in your vertical or lateral file cabinet Perfect for business, office meeting, school, travel, outdoor activities and casual daily use with this slim document bag, especially for businessman and management executive. portable folder pure durable satchel is perfect with students, musician, violinist, lawyer, office workers, teachers, and other profession. colour:black Material:plastic size:32*26*22cm Package Contents: 1* music Only the above package content, other products are not included. Note: Light 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.