The OEM SureHook Reinforced Hanging File Folder is designed for letter-size documents. It features SureHook Technology with built-in tension springs that ensure folders stay on track and slide with ease. The reinforced, polylaminated tops and bottoms provide ultimate durability, making it a reliable choice for organizing important papers. Made with 10% total recycled fiber and 10% post-consumer fiber, this folder is also acid-free.