The OEM Sure Hook Hanging Pocket is a letter-size folder designed with SureHook Technology, featuring built-in tension springs that ensure folders stay on track and slide with ease. It includes full-height, 3-1/2" expandable gussets that prevent the folder from getting caught on folder rails. Made with polylaminate, the reinforced folder tops contain 10% post-consumer fiber and are acid-free. This product comes in a standard green color and is sold in packs of 4.